Who developed his theory of evolution by natural selection based largely on
observations he made on the Galapagos Islands?
A. Thomas Malthus
B. Gregor Mendel
C. Wilhelm Weinberg
D. Charles Darwin
Answers
D. Charles Darwin
Explanation:The theory of evolution explains the changes that organisms go through in order to survive. This theory was developed by Charles Darwin.
Galapagos Islands
The Galapagos are known for their biodiversity. Additionally, the islands are isolated from each other. This means that the organisms on different islands were able to develop independently from each other.
Two important species on the Galapagos include the Galapagos tortoise and the Finch.
The Galapagos tortoise was studied by Charles Darwin. He noted that despite the fact the tortoises were the same species, the tortoises on different islands had different shell shapes.Darwin also studied Finches across the islands. Similar to the tortoises he saw that the beak sizes of the same species differed depending on the island.Evolution
Based on the differences between the organisms, Darwin concluded that over time the organism must have changed their physical traits to survive better. For example, on islands with a lot of hard seeds, the finches would have stronger beaks so that they could access more food.
Evolution occurs through natural selection. Natural selection is when organisms that have traits better suited to their environment reproduce more. Thus, spreading these traits into the gene pool.
So, the differences in the organisms on different islands show how animals can change their traits to adapt to their environments.
Related Questions
Throughout the years, many scientists have proposed theoretical models of the atom. The first image below is the plum pudding model of the atom proposed by J.J. Thomson.
Upon discovering the electron, Thomson designed a model of the atom in which negatively charged particles, or electrons, existed within a positively charged fluid. Thomson's analogy compared an atom to plum pudding, in which electrons were arranged like suspended raisins within a pudding filling.
Later, Ernest Rutherford experimented with thin sheets of gold foil. He shot alpha particles, or protons, toward the foil. He expected most particles to pass through the foil with only a small deflection. However, he observed that some particles were deflected at great angles, indicating they hit a concentrated, positively charged mass. Many other particles were not deflected at all.
The image on the right is the atomic model developed by Rutherford following his gold foil experiment. This experiment led to the rejection of the plum pudding model and the discovery of the nucleus.
Which of the following statements best describes J.J. Thomson's plum pudding model?
A.
It provided a new, testable description of the atom. Though it was an inaccurate model, it gave other scientists ideas to further our understanding of atoms.
B.
It was inaccurate and provided no new insight into the understanding of the atom. Because of its flaws, the model should never have been published. J.J. Thomson's research possibly slowed down the progress of atomic research.
C.
It was very similar to Rutherford's model. However, Rutherford disproved the existence of electrons. The absence of electrons in the second model is evidence of this.
Answers
J.J. Thomson plum pudding model of the atom was an early theoretical model that provided a new description of the atom, which was previously thought to be indivisible. The correct option is A.
Thus, the plum pudding model is a significant step in the understanding of the atom and it also provided other scientists ideas for atomic models. The model stated that negatively charged electrons were distributed all over the positively charged fluid, like raisins in a plum pudding.
However, the plum pudding model was inaccurate through experiments like Rutherford gold foil experiment, which states that the positive atomic charge of an atom is concentrated only in a tiny, dense nucleus at the center, with electrons.
Thus, the ideal selection is option A.
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Answer the question
Answers
Which of the following statements accurately explains the relationship between time of day and water transport through the plants? (Answer choices in the photo, and a graph.)
Answers
The best option would be the letter B. At night, the stomata are closed so water in the leaves cannot evaporate, which reduces the need fro absorption of water at the root.
2. Can humans exist if one level of biological organization is absent?
Answers
Answer: No because each have an important impact on humans.
Explanation:
Help me please I’ll mark brainly
Answers
3. BB, Bb, bb
4. A, A, a
5. 75%
6. 25%
7. 50%
Which group 2 element has fewer protons than bromine but more protons than sulfur
Answers
Answer:Calcium (ca)
Explanation:
it is a group 2 element having fewer protons than bromine but more protons than sulfur.
What is the main difference between prokaryotic cells and eukaryotic cells?
Question
What is the main difference between prokaryotic cells and eukaryotic cells?
Responses
A Only eukaryotic cells have its genetic material surrounded by a membrane.Only eukaryotic cells have its genetic material surrounded by a membrane.
B Eukaryotic cells are smaller than prokaryotic cells.Eukaryotic cells are smaller than prokaryotic cells.
C Prokaryotic cells have many organelles, each with their own specialization function.Prokaryotic cells have many organelles, each with their own specialization function.
D Eukaryotic cells have a cell membrane and a cell wall; prokaryotes have a membrane only.
Answers
Answer: The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not
Explanation:
what are the components of water potential, and why is water potential important for the movement of water in plants?
Answers
Components : pressure and solute potential.
Importance :
1) Ensures water moves into plant root
2) Helps movement of water within a plant
3) Factor involved in transpiration
4) Cell wall allows for increased pressure
5) Pressure counteracts osmolarity
Water potential is the energy required, consistent with quantity of water, to transport an infinitesimal amount of water from the pattern to a reference pool of natural loose water. To recognize what meaning, examine the water in a soil sample to water in a drinking glass.
Osmoregulation refers back to the manage of water capability of the blood. The blood is complicated, it has these kind of ions and proteins and stuff. Cells use various things up all of the time and a few more frequently than others at one-of-a-kind instances, night, day, sweat, tears, and many others.
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Increase in blood ca2 stimulates __________ secretion, which leads to __________.
Answers
Increase in blood Ca2+ stimulates parathyroid hormone (PTH) secretion, which leads to calcium reabsorption.PTH (parathyroid hormone) is a hormone that is secreted by the parathyroid gland when there is a decrease in blood calcium levels.
PTH raises calcium levels by stimulating calcium release from bones and increasing the uptake of calcium by the kidneys. PTH also stimulates the kidneys to convert vitamin D to its active form, which enhances the absorption of calcium from the gastrointestinal tract.In contrast, an increase in blood calcium levels stimulates the secretion of calcitonin, which inhibits calcium release from bones and promotes calcium deposition in bones.
Additionally, calcitonin can decrease calcium uptake by the kidneys.Calcitonin and PTH together help to regulate calcium levels in the blood and ensure that the levels remain within a healthy range.
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ribosomes consist of two subunits, each surrounded by a membrane. true/false
Answers
The statement "ribosomes consist of two subunits, each surrounded by a membrane" is false.
Ribosomes are indeed made up of two subunits, a large subunit and a small subunit.
However, these subunits are not surrounded by a membrane. Ribosomes are made up of ribosomal RNA (rRNA) and proteins, and they lack a surrounding membrane.
They are considered to be non-membrane bound organelles in the cell.
The primary function of ribosomes is to synthesize proteins, which are essential for various cellular processes.
Ribosomes can be found either bound to the endoplasmic reticulum (ER) membrane or free-floating within the cytoplasm.
The proteins synthesized by ribosomes bound to the ER are usually destined for secretion or insertion into membranes, while those synthesized by free ribosomes are generally used within the cell.
In summary, ribosomes do have two subunits but are not surrounded by a membrane. This makes the statement false.
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Pretest: Unit 1
John is testing the effect of temperature on the solubility of sugar in water,
He organized data about his experiment in the following table:
Group A
Group B
Group
Volume of water 100 ml
Temperature
25°C
90°C
5°C
1000 g
Initial mass of
sugar
Final mass of
sugar
Which of the following would be the best volume of water to use in Group B?
Answers
Final mass of sugar
Group A
EyeMax based in Cambridge is a medical company specialising in reselling corrective lenses to reduce myopia in children for the UK and Spanish market. Prévoyance based in France hold the distribution rights for the rest of the EU. The business has recently received exclusive distribution rights for the Orthok range of lenses based on sales performance and customer satisfaction. The rights can be withdrawn if EyeMax fail to fulfil orders for this growing market.
- 50 ADV (average daily volume/package) UK mainland, 20 ES
- B2B 95% (hospitals, clinics and opticians), 5% B2C
- Order weight <0.5kg
- Single units have package dimensions of (20x15x2)cm
- Sometimes irregular shaped packaging is used for large orders of Orthok stands and posters which are promoted in the clinics. This accounts for 5 ADV (average daily volume/package)
- Order value is high (£540)
- Shipments are non-urgent so only a Standard service is needed
- Packages should not be left out in warm conditions for too long, optimal temp is 3 °C to 5 °C
Outbond
- 2 people responsible for preparing shipping labels taking 2.5 minutes per order
- Same people respond to any shipping queries and follow up with carriers
- Orders are manually keyed into the DHL shipping system held in WooCommerce
- Around 15% WISMO (Where is my order) calls received daily regarding delays and undeliverables RTS (Return-to-sender)
- It is important to know the exact shipping costs as soon as possible since invoicing the end customer especially in Spain, as it can affect margins, particularly for the promotional stands and posters
- Contracts with NHS England means proof of delivery needs to be retained for 12 months
inbound
- Express Freight shipments from the US are received once a month to the Cambridge site
- The carrier from the US has dated visibility tools and is only familiar with the old industry standard of EDIFACT (Electronic Data Interchange for Administration, Commerce and Transport) making visibility an issue. This affects stock allocation.
- EyeMax have found the products sometimes stick together upon arrival affecting the overall quality of the packaging
- For any urgent order unable to be immediately fulfilled, the customer is asked if they can wait up to 4 weeks or an internal purchase order is made to Prévoyance
- Prévoyance may despatch to the Cambridge site 3-5 times, often at the end of the month
Questions 1. From the information known, map out the supply chain
Answers
Operations performance objectives trade off against each other as the performance of one objective can be improved by compromising on another.
These trade-offs are mostly due to resource constraints, and thus, they are a significant factor in operations management.
What are operations performance objectives?Operations performance objectives refer to the specific outcomes that an operation seeks to achieve. They are the goals of an operation. Organizations use operations performance objectives to create a strategy that addresses the objectives and outlines how to achieve them. Operations performance objectives are split into five categories: Cost: This objective refers to providing a service or product at the lowest possible cost.
Quality: This objective refers to providing a service or product that meets or exceeds customer expectations. Speed: This objective refers to delivering a service or product quickly. Dependability: This objective refers to delivering a service or product as promised. Flexibility: This objective refers to the ability to provide a service or product that meets customer needs. Operations performance objectives trade-offs Operational performance objectives trade-offs refer to the relationship between performance objectives. In operations management, achieving one objective often means sacrificing another. For example, achieving higher quality may mean incurring higher costs, which is a trade-off between quality and cost. In some cases, achieving one objective may enhance another. For instance, a quicker turnaround time (speed) can increase dependability and flexibility. These examples show that trade-offs can be positive or negative. The following are common trade-offs among operational performance objectives: Cost vs. quality: Offering higher quality goods or services will increase costs. Flexibility vs. speed: Being flexible slows down the speed of operations. Speed vs. quality: Higher speed may lead to lower quality. Dependability vs. flexibility: To be dependable, the operations need to be standardized, limiting flexibility.
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What specialized tissues do vascular plants have that other plants do not?
Answers
Answer:
Non-vascular plants are plants without a vascular system consisting of xylem and phloem. Although non-vascular plants lack these particular tissues, many possess simpler tissues that are specialized for the internal transport of water.
Explanation:
Answer:
Tissues for moving water around.
Explanation:
Question 14 (2 points) The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called natural selection. O mutation. genetic drift. migration.
Answers
The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
A mutation is a sudden and lasting alteration in the DNA sequence that can influence genetic variation. Changes in the DNA sequence can influence phenotype, which may or may not have an effect on an organism's fitness. Mutations occur spontaneously, either from errors in DNA replication or from exposure to mutagenic agents. Mutations may happen in either coding or non-coding regions of the DNA, and they can be either silent or expressed.
Evolution is a natural process that results in the gradual change of inherited characteristics in populations over generations. It is the process of alteration in the inherited characteristics of species over successive generations. In other words, it is the process of gradual changes that happen to species over time as they adapt to their environments. It can be defined as a change in the gene frequency in a population over time.
Types of Evolution 1. Natural Selection 2. Genetic Drift 3. Gene Flow 4. Mutation 5. Non-Random Mating 6. Admixture 7. Mutation Pressure 8. Genetic Draft 9. Bottleneck and Founder Effect 10. Sexual Selection the process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
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a collection of different populations forms a(n) group of answer choices ecosystem. biosphere. tissue. lithosphere. community.
Answers
A collection of different populations forms an E. Community.
A community in ecology is a group of different species that live together in a specific area or region and interact with each other, forming a relationship or network that helps regulate and balance the ecosystem. Biosphere is defined as the part of the Earth where living things exist, which includes all of the planet's ecosystems, such as the atmosphere, the oceans, the soil, and the Earth's crust.
The ecosystem is defined as a community of organisms that interact with their environment, both biotic and abiotic, and influence one another's existence, development, and survival. Lithosphere is defined as the rocky outermost shell of the Earth, consisting of the crust and the uppermost portion of the mantle. Tissue is a group of similar cells that perform a specific function, such as muscle tissue or nervous tissue. Therefore, Option E is correct
The question was incomplete. Find the full content below:
A collection of different populations forms an
A. Ecosystem
B. Biosphere
C. Tissue
D. Lithosphere
E. Community.
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lactobacillus species are poor indicator species because they are abundant in the environment are fastidious require nitrogen incubation chambers tolerate oxygen
Answers
Lactobacillus species are poor indicator species.
Indicator species are used in microbiology to indicate the presence or absence of certain conditions or pathogens in a sample. However, some bacterial species are not suitable as indicator species due to various reasons, and Lactobacillus is one of them.
Lactobacillus species are poor indicator species because they are abundant in the environment. They are commonly found in soil, water, and plants, as well as in the digestive tract of humans and animals. Therefore, the presence of Lactobacillus in a sample does not necessarily indicate the presence of a particular pathogen or condition.
In addition, Lactobacillus species are fastidious, meaning they have specific nutritional requirements that must be met for optimal growth. This makes it difficult to use them as indicator species since their growth may be inhibited by the conditions present in the sample being tested.
Furthermore, Lactobacillus species require nitrogen for growth, which is not always present in certain samples. Also, Lactobacillus species are facultative anaerobes, meaning they can grow in the presence or absence of oxygen, making them unsuitable for testing oxygen levels in a sample.
In conclusion, Lactobacillus species are poor indicator species due to their abundance in the environment, fastidious nature, nitrogen requirement for growth, and ability to tolerate oxygen. Therefore, other bacterial species are more suitable as indicator species for specific conditions or pathogens. Understanding the limitations of certain bacterial species is crucial for accurate interpretation of microbiological test results and effective diagnosis and treatment of infectious diseases.
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How has the carbon cycle changed between the Pre-Industrial and Post-Industrial eras?
Answers
Answer: It converts corbon to dox
Explanation:
According to the article, "Some scientists also object, on principle, to use of the heavily freighted term culture, which long has been denoted something peculiarly human". Why do you think some scientists object to using the term "culture" to describe primate behaviour?
Answers
Scientists are reluctant to use the word culture to refer to primate behavior because it has not been determined if this behavior can be classified as human or is human-like.
What is culture?Culture is a word to describe the beliefs, practices, etc. of human groups. Due to this, culture is often used in areas such as sociology but not in biology as most scientists believe this term is used exclusively for human groups.
Why are scientists reluctant to use this term?Scientists' research has determined some organisms such as primates display very similar behaviors to humans. Despite this, some scientists do not feel it is accurate to describe these behaviors as culture.
This occurs because:
There are biological and behavioral differences between these primates and humans.Culture has been traditionally used to describe human communities not other animals communities.Using culture might imply other primates are equal to humans.Note: This question is incomplete because the article is not given; due to this, I answered it based on general knowledge.
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1. Which of the following is an example of sensitization:
You blink each time your eye doctor gives you a puff of air in your eyes.
A dog was hit by his previous owner, and now the dog cowers each time his new owner reaches out to pet him.
You no longer feel your shirt touching your skin.
You're walking on the sidewalk and a bicyclist almost hits you, so you jump out of the way.
Answers
The example of sensitization from the given alternatives is that 'A dog was hit by his previous owner, and now the dog cowers each time his new owner reaches out to pet him.'
Sensitization refers to the process in which an organism becomes more sensitive to stimuli, both good and bad. It happens when the body's nervous system becomes oversensitized to a particular stimulus that it begins to respond even to weaker or non-threatening stimuli.
The example given in the first option refers to a simple reflex action that occurs in response to the puff of air that is blown into the eyes during the eye examination. The third option is about sensory adaptation, which occurs when sensory receptors are exposed to stimuli for an extended period, resulting in a reduction in sensitivity. The fourth option refers to the fight or flight response that occurs as a result of a threatening stimulus, in which an individual's body prepares to confront or flee from danger.
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PLS ANSWER 50 POINTS!! MARKING BRAINLIEST!!! (ANSWER ALL OR I'LL BE POSTING THE THREE QUESTION INDIVIDUALLY, IF YOU DON'T KNOW ALL OF THEM)
Describe what the purpose of your reforestation efforts is in combating climate change and describe how it works
Identify the part(s) of the world that are currently planning or doing reforestation efforts
Explain how reforestation efforts will directly combat climate change (how will the action reduce the causes and/or negative effects of climate change)
Answers
Answer:
Reforestation offers one of the best ways to remove carbon dioxide from the atmosphere, turning it into solid carbon through photosynthesis and storing it in tree trunks, branches, roots, and soil.
The countries that have the most forest-ready land are: Russia, Canada, Brazil, Australia, United States and China. The four major strategies are: Increase the amount of forested land through reforestation. Increase density of existing forests at a stand and landscape scale.
We estimate that reforestation since 2000 is on pace to remove 103 billion tons of carbon dioxide from the atmosphere between 2020-2050. Increasing the pace of tropical reforestation would remove substantial amounts of additional carbon dioxide at low cost.
I hope this is correct, and it helps.
Which lymphoid organ serves as the site where T lymphocytes become immunocompetent T cells? A. thymus gland B. tonsils C. spleen D. thyroid gland
Answers
The thymus gland is a primary lymphoid organ where T lymphocytes, also known as T cells, mature and become immunocompetent. The correct option to this question is A.
These T cells then migrate to other lymphoid organs, such as the spleen and lymph nodes, to carry out their immune functions.
The thymus gland is the site of T cell maturation is because it contains specialized epithelial cells that interact with immature T cells and direct their development into mature T cells with diverse immunological specificities.
The thymus gland is a crucial organ for the development of the immune system, as it produces functional T cells that can recognize and respond to a wide variety of pathogens and foreign substances.
The thymus gland is the lymphoid organ responsible for the maturation and development of T lymphocytes into immunocompetent T cells. This process is crucial for the adaptive immune system, as it helps the body recognize and respond to various pathogens and foreign substances.
The thymus gland serves as the site where T lymphocytes become immunocompetent T cells, playing a vital role in the adaptive immune system.
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Which three types of rnas are found in both prokaryotes and eukaryotes?.
Answers
Answer:
Three types of RNAS: messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA)
Explanation:
does this help you???
which is considered a scientific observation?
Answers
Answer:
Observations are receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments.
Any data recorded during an experiment can be called an observation.
Answer: Mahir noticed the plants he watered grew taller than those with less water.
Explanation:
Which hormone are part of the ovarian cycle and what do each of them do?
Answers
Answer:
Progesterone and Estrogen are the part of ovarian cycle
They regulate the development and function of the uterus. These hormones act by regulating the transcription of specific genes in the uterus.
I need help with this practice problem Fill in the blanks
Answers
Solid fossil fuel are formed over millions of years by decay of land vegatation or plant remains. When the layers are settled and heated, coal is produced as deposits. Fossil fuels are burned to produce energy. Power plants burn coal or oil to build heat that is consequently used to make steam to drive turbines which generate electricity.
Answer - Solid fosiil fuel formed from decay of land vegetation or plant remains. Produces energy when burned.
Which statement describes a cell part needed by the cell to make proteins?
A) Chloroplasts contain chlorophyll
B) Vacuoles contain water
C) The nucleus contains DNA
D) Cell membranes contain phospholipids
Answers
Which of these groups has the most organisms?
Answers
Answer:
The answer is Kingdom
Explanation:
how does the relation between temperament and life decisions illustrate the gene-environment correlation phenomenon in the nature/nurture debate?
Answers
The relation between temperament and life decisions illustrates the gene-environment correlation phenomenon in the nature or nurture debate because surrounding conditions are able to shape gene expression patterns and thus control phenotypic features.
What is the gene-environment correlation phenomenon?The gene environment correlation phenomenon is a genetic model that states how gene expression in a particular environment is able to shape the phenotypic features of an organism, i.e. the morphological and or behavioral traits in animals and humans.
The gene environment correlation phenomenon is well known to control the phenotypic expression of quantitative traits such as those associated with behavior (temperament).
Therefore, with this data, we can see that the gene environment correlation phenomenon is able to control the development of quantitative traits such as those associated with the behavior, and therefore a suitable surrounding environment may stimulate to enhance certain types of traits.
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5. When is extinction of a species most likely to occur?
A)when environmental conditions remain the same and the proportion of individuals within the species that lack adaptive traits increases
B)when environmental conditions change and the members of the species lack adaptive traits to survive and reproduce
C)when environmental conditions change and the adaptive traits of the species favor the survival and reproduction of some of its members
D)when environmental conditions remain the same and the proportion of individuals within the species that possess adaptive traits increases
Answers
Answer:
Extinction occurs when species are diminished because of environmental forces (habitat fragmentation, global change, natural disaster, overexploitation of species for human use) or because of evolutionary changes in their members (genetic inbreeding, poor reproduction, decline in population numbers).
The extinction of a species is most likely to occur when environmental conditions change and the members of the species lack adaptive traits to survive and reproduce.
What do you mean by Species?Species may be defined as a group of organisms that can reproduce naturally with one another and create fertile offspring.
If the members of species do not have adaptive traits to survive and reproduce, they will definitely become extinct in near future.
This is because the relative fitness is directly related to the appearance or existence of particular species in the habitat.
Therefore, the extinction of a species is most likely to occur when environmental conditions change and the members of the species lack adaptive traits to survive and reproduce.
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As the medical examiner performs an autopsy on a body found in a nearby forest, she collects sand from between the victim's toes
that is identical to sand from a beach located 20 miles from the scene. What is the most important reason that this is relevant to
the case?
A)
It suggests that the victim may have drowned.
B)
It suggests that the victim may have taken a recent vacation.
0
It suggests that the crime may have occurred at another site.
D
It suggests that the suspect may have been to the beach recently.
Answers
Answer:
It suggests that the crime may have occurred at another site.