Answers
Related Questions
Complementary proteins are made by combining two protein sources to make a complete protein. What is an example of a complementary protein
Answers
Lentils or legumes with grains, nuts/seeds or dairy.
Grain foods with dairy products.
Dairy with nuts and/or seeds
In eastern gray squirrels, Sciurus carolinensis, the allele for black fur (B) is dominant to the allele for gray fur (b). In a particular population of gray squirrels, 64% have black fur and 36% have gray fur. A researcher calculated the allelic frequencies to be B = 0.4 and b =0.6. Five years later, the researcher returned to the location and determined the allelic frequencies within the squirrel population to be B = 0.6 and b = 0.4. Which of the following could best explain the increase in the frequency of the Ballele in the population after five years?
(A) The frequency of the B allele increased because it is the dominant allele.
(B) The frequency of the Ballele increased because squirrels with gray fur exhibited greater fitness.
(C) The frequency of the B allele increased due to the selective pressures of the environment.
(D) The frequency of the Ballele increased because black squirrels randomly mate with other eastern gray squirrels.
Answers
The frequency of the B allele increased due to the selective pressures of the environment (Option C). It is fundamental in evolution.
What is evolution?Evolution can be defined as descendence with modification, which mainly happens due to natural selection.
Natural selection refers to the differential survival and reproduction of the fittest organisms in a population.
Selective environmental pressures affect reproduction/survival and favor the most adapted organisms.
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Which of the following best explains how the flagellum contributes to the function of the sperm cell?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
It allows the sperm cell to function similarly to cells that do not have flagella.
(Choice B)
B
It contains the sperm cell’s DNA.
(Choice C)
C
It can cause the sperm cell to move.
Answers
Option C It can cause the sperm cell to move. The sperm moves forward via a whip-like motion produced by its flagellum. Due to the nature of flagellar movement and propulsion, the sperm cannot swim backward.
What is a sperm and its functions?The sperm cell, a male reproductive cell, is responsible for providing 50 percent of the genetic material required for the development of a fertilised zygote or embryo during sexual reproduction with an egg in a female body. The sperm enters the egg by the acrosome, which is located at the tip of the sperm head. The midpiece contains the mitochondria, which are responsible for the tail's energy. The tail whips back and forth to push the sperm in the direction of the egg. The sperm flagellar movement is produced by the sliding of outer-doublet microtubules, which are propelled by dynein's, which are molecular motors. Through protein phosphorylation, the radial spoke/central pair apparatus controls dynein activity, which propagates the flagellar bend.
The axoneme of the mammalian sperm flagellum is made up of a 9 + 2 microtubule configuration, which is comparable to that of motile cilia. Most animals' motile sperm use a single flagellum at the back of the cell for propulsion however, sperm from green algae and plants have many flagella.
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2. Which of these practices helps cut down on waste?
A) O Reduce
B) O Reuse
C) O Recycle
DO All of the above
Answers
Reduce, reuse, and recycle all of these practices helps cut down on waste, Reducing the quantity of garbage we generate is made easier by following the three R's of reduce, reuse, and recycle, hence option D is correct.
How to reduce waste?They preserve energy, landfill space, and natural resources. Additionally, communities need less land and money to dispose of waste in landfills when they follow the three R's.
Reduce refers to reducing the quantity of waste we produce. Finding new uses for items that would have otherwise been thrown out is meant by reuse.
Recycling refers to the process of converting waste materials, such as plastic milk bottles, into new, valuable materials (like picnic benches, playground equipment, and recycling bins).
Therefore, option D is correct.
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Which is true of scientific methods?
Ο Α.
A. They include a set number of steps to follow in order
B. To be fair, they must include the use of a model.
o
C. Only some of the hypotheses have to be testable,
O D. They help scientists organize their investigations.
Answers
Answer:
A. They include a set number of steps to follow in order
If a climate change occurs, resulting in increased aridity (severe drying) of areas previously covered by swamps with lush vegetation, predict which type of plants are more likely to survive ???
a. plants that reproduce using seeds
b. plats that reproduce using spores
c. the type of plant reproduction will have no effect on plant survival
d. all of the plant species will go extinct
e. all of the plant species will survive
Specify the dominant type of tectonic plate motion which led to orogeny during the Paleozoic Era
a. convergent
b. divergent
c. transform
State the correct order of appearance of vertebrates in the fossil record.
Fish, Reptile, Amphibian, Mammal
Reptile, Amphibian, Fish, Mammal
Fish, Amphibian, Reptile, Mammal
Reptile, Fish, Amphibian, Mammal
Amphibian, Fish, Reptile, Mammal
Predict what will happen to the diversity of shallow water marine invertebrates in Paleozoic epicontinental seas if there is a regression, which severely decreases the area of the continent covered by shallow water and the habitat.
a. invertebrate diversity will increase
b. invertebrate diversity will decrease
c. there will be no effect on invertebrate diversity
d. all of the invertebrates will go extinct
e. the invertebrates will learn to live on dry land
If a climate change occurs, resulting in increased aridity (severe drying) of areas previously covered by swamps with lush vegetation, predict which type of plants are more likely to survive.
a. there will be no effect on the vertebrates that inhabit the swamps
b. the size and diversity of vertebrates that lay their eggs in water will increase
c. vertebrates that lay can lay eggs in water will be more likely to survive
d. vertebrates that can lay eggs on dry land will be more likely to survive
e. all of the vertebrates will go extinct
If a climate change occurs, resulting in increased aridity (severe drying) of areas previously covered by swamps, predict the effect on vertebrates
a. there will be no effect on the vertebrates that inhabit the swamps
b. the size and diversity of vertebrates that lay their eggs in water will increase
c. vertebrates that lay can lay eggs in water will be more likely to survive
d. vertebrates that can lay eggs on dry land will be more likely to survive
e. all of the vertebrates will go extinct
Answers
The given questions are based on evolutionary changes occur due to adaptation to the modified surroundings as a consequence of survival of the fittest. If a climate change occurs, resulting in increased aridity of areas previously covered by swamps with lush vegetation, plants that reproduce using seeds are more likely to survive. Thus, the correct option is A.
1. If a climate change occurs, resulting in increased aridity (severe drying) of areas previously covered by swamps with lush vegetation, plants that reproduce using seeds are more likely to survive. Thus, the correct option is A.
2. The dominant type of tectonic plate motion that led to orogeny during the Paleozoic Era was convergent plate motion. Thus, the correct option is A.
3. Fish, Amphibian, Reptile, Mammal is the correct order of appearance of vertebrates in the fossil record. This sequence represents the evolutionary progression of vertebrates, with fish appearing first, followed by amphibians, reptiles, and finally mammals. Thus, the correct option is C.
4. If there is a regression, which severely decreases the area of the continent covered by shallow water and the habitat, the diversity of shallow water marine invertebrates in Paleozoic epicontinental will decrease. Thus, the correct option is B.
5. If climate change results in increased aridity of areas previously covered by swamps, the effect on vertebrates would be that vertebrates that can lay eggs on dry land will be more likely to survive. Thus, the correct option is D.
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Question 7 of 30
Which term describes the process by which nations become more connected
through communication, trade, and the exchange of ideas?
A. Globalization
B. Specialization
O C. Desertification
O D. Deforestation
Answers
I believe the answer is globalization ^^
Answer:
The term that will mostly describes the process which nations become More connected through communication, trade and the exchange of ideas is Globalization.
If a cell's organelle worked in an actual human factory and had the role of the electric generator, which organelle would it be?
Answers
Answer: mitochondria
Explanation:
An electric generator produces energy to do work. A mitochondria produces ATP to power the cell.
species of corals often possess symbiotic algae in their bodies, which supply the corals with nutrition. one species of coral lives in bright light in shallow water, and another lives in deeper waters away from the light. each species possesses its own populations of symbiotic algae. if each population of algae becomes adapted to its environment, what should happen to the genetic relatedness of the two populations of algae?
Answers
As each population of symbiotic algae becomes adapted to its specific environment, it is likely that the genetic relatedness between the two populations will decrease.
Why would genetic relatedness decrease?
This is because the selective pressures and environmental conditions in the shallow water habitat will be different from those in the deeper water habitat. Over time, the genetic differences between the two populations may accumulate and lead to the development of distinct genetic lineages. However, it is important to note that the two populations of algae will still maintain their symbiotic relationship with their respective coral hosts, despite any genetic differences that may arise. This symbiotic relationship is crucial for the survival and growth of both the corals and the algae.
When considering the species of corals that possess symbiotic algae in their bodies, we can observe two different environments: shallow water with bright light and deeper water with less light. Each species has its own population of symbiotic algae that become adapted to its specific environment. The genetic relatedness between the two populations of algae should decrease over time because the two populations are experiencing different selection pressures, which can lead to genetic divergence and eventually result in distinct, specialized populations that are better suited to their specific environments.
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any four application solar energy
Answers
Answer:
The solar energy is used in residential homes for heating the water with the help of solar heater.
Explanation:
What macromolecules are capable of self-replication?
Proteins
RNA and DNA
Polysaccharides
Fats and triglycerides
Answers
Answer:
B
Explanation:
RNA and DNA
Buffalo grass is a species of plant found on the grazing prairie of Wyoming. It is a tough grass that has silicates (compounds containing oxygen and silicon) that reinforce its leaves. This variation has allowed this type of grass to survive for many years in a harsh environment.
a. This is an example of which mechanism?
b. Explain why
Answers
Buffalo grass is tough due to the presence of silicates which reinforces the leaves of this plant and allows it to survive in harsh environment and this a classic example of adaptation.
Buffalo grass is basically a grass which is perennial to western North American. Buffalo grass is found in the short-grass as well as the mixed-grass prairies and is a very important year-round forage grass.
It is a very tough grass and this property of buffalo grass can be attributes to the presence of silicates, which are basically compounds that contain oxygen as well as silicon, in its leaves. This particular adaptation has allowed this grass to be drought resistant and survive for a lot of years in a very harsh environment.
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which two spicies are more closely related: humans and snakes or humans and lizards? how do you know?
Answers
Answer:
It's no A
It's not B
it's C
Explanation:
Humans and lizards
Is more closely to each other
Explain water's role as a solvent in blood.
Answers
Which process naturally increases the amount of nitrogen in the soil?
A. Pollution
B. Decomposition
C. Eutrophication
D. Combustion
Answers
Answer:
Explanation:
During the decomposition about plant matter, organic nitrogen is once again converted to inorganic ammonium and released into the soil. The process that converts organic N to ammonium is called mineralization and plays a significant role in the management of nitrogen.
Answer:
Decomposition
Explanation:
Took the test
The doctor ran some blood tests, including a differential white cell count, and to his delight, John’s T cell count is normal, and there are no signs of HIV antibodies. However, John’s eosinophil, basophil, and neutrophil counts are elevated.
Answers
The differential white cell count is one of the many tests that can be run on a blood sample. It examines the types and numbers of white blood cells, specifically neutrophils, eosinophils, basophils, lymphocytes, and monocytes.
A doctor ran some blood tests on John, including the differential white cell count, to see what might be causing his elevated eosinophil, basophil, and neutrophil counts.
He discovered that John’s T cell count is normal, and there are no signs of HIV antibodies.
In general, elevated eosinophil counts indicate that a person is suffering from an allergic or parasitic infection. Basophils, which are closely linked to eosinophils, can also become elevated in people with allergic reactions or parasitic infections.
Finally, neutrophils are an essential part of the body's immune system, and an elevated count typically indicates that the body is fighting off an infection, inflammation, or injury. In some cases, they may also indicate the presence of cancer.
Since John has elevated eosinophil, basophil, and neutrophil counts, he may be suffering from an allergic reaction, a parasitic infection, or an infection of some kind. The doctor will need to perform further testing to determine the precise cause of John's elevated white cell counts.
This might include more blood tests, as well as imaging scans, biopsies, or other procedures.
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consider the diffusion of oxygen ions through a solid fuel cell membrane. if you double the absolute operating temperature of the fuel cell, what will happen to the diffusivity of the oxygen ions in the membrane?
Answers
Doubling the absolute operating temperature of the fuel cell will cause the diffusivity of the oxygen ions in the membrane to increase.
This is because the higher temperature will cause the viscosity of the membrane to decrease, which will allow the oxygen ions to move more freely and diffuse more quickly through the membrane.
Additionally, the increased temperature will cause the oxygen ions to have more energy and thus be more likely to diffuse through the membrane.
This increased energy will also make the particles more likely to break any hydrogen bonds that may be present. As a result, the oxygen ions will be able to travel faster, resulting in an overall increase in the diffusivity of the oxygen ions in the membrane.
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The anti-Mycobacterium tuberculosis compounds isolated from sea sponges by the research team in this case are made by microbes living in the sponges. Group startsTrue or False
Answers
The anti-Mycobacterium tuberculosis compounds isolated from sea sponges by the research team in this case are made by microbes living in the sponges. False
The compounds isolated from sea sponges and found to have anti-Mycobacterium tuberculosis activity are likely produced by the sponges themselves as a defense mechanism against pathogens. While some marine organisms have been found to harbor microorganisms that produce bioactive compounds, there is no indication in this case that the compounds were made by microbes living within the sponges.
The research team likely isolated and identified the compounds from the sponges through a process of extraction, purification, and chemical analysis, rather than through analysis of microbial populations within the sponges.
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If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes.
Answers
Answer:
If a sperm cell contains 8 chromosomes, it comes from an animal that has 16 chromosomes.
Thick dental enamel in__________ helps with crushing food. A. Australopithecines B. Apes C. Prosimians D. Eosimians.
Answers
Thick dental enamel in A. Australopithecines helps with crushing food.
Australopithecines were hominins that lived between approximately 4.2 and 1.4 million years ago. They are known for their bipedal locomotion and a mix of ape-like and human-like characteristics.
One notable feature observed in the fossil record of Australopithecines is their robust craniodental anatomy, including thick dental enamel.
Thick dental enamel in Australopithecines is thought to have provided them with a greater ability to withstand the mechanical stresses associated with chewing tough and abrasive foods.
This robust enamel, which forms the outer layer of the tooth crown, helps protect the underlying dentin and pulp from wear and damage during mastication.
The presence of thick dental enamel suggests that Australopithecines consumed a diet that required extensive chewing and processing. Their teeth exhibit features such as large molars and premolars with thick enamel ridges, adapted for grinding and crushing tough plant material.
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Which fundamental principle surrounding enzymes explains why transition state analogues are able to act as potent inhibitors of naturally occurring enzymes
Answers
A fundamental principle surrounding enzymes is that they can only catalyze reactions if the substrate binds to a specific site on the enzyme. This site is known as the active site.
The active site of an enzyme is a highly specific region that contains amino acid residues that interact with the substrate. These residues form a complementary shape that is specifically tailored to bind to the substrate. This binding of the substrate to the active site is what allows the enzyme to catalyze the reaction.
The transition state of a reaction is the energy state of the molecules just before the products of the reaction are formed. Transition state analogues are molecules that are designed to mimic this transition state and can be used to inhibit the enzyme.
Due to their similarity to the transition state of the reaction, the transition state analogues bind to the active site of the enzyme. This binding is strong and tight, preventing the natural substrate from binding. Therefore, the enzyme is unable to catalyze the reaction and is inhibited.
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Why are the products of the light reaction of photosynthesis importnant
Answers
Answer:
it produces atp and nadph
Explanation:
The space between the canine and the first premolar in the lower jaw of some primates is a(n) Group of answer choices mandibular gap. alveolus. retrocanine space. diastema.
Answers
Answer:
Diastema
Explanation:
The human teeth comprises of incisors, canine, premolars and molars.
The canine and incisors are for tearing and cutting while molars and premolars are for grinding.
DIASTEMA is a space between the canine and the first premolars. It is the space between the upper jaws teeth. It is caused as a result of imbalance or unequal relationship between the size of upper jaws teeth.
diastema (plural diastemata) is a space or gap between two teeth. It is common in children and adults.
Therefore, the space betwee canine and first premolar is DIASTEMA.
The space between the canine and the first premolar in the lower jaw of some primates is known as diastema
A diastema (in plural diastemata) occurs when there's a gap between two teeth, which is usually more perceptible between front teeth. Diastema is due to an imbalance in the relationship between the jaw and the size of the teeth. Many different mammals (including primates) exhibit diastemata between the incisors and molars. In humans, diastemata mainly occur between the upper incisors (i.e., front teeth), although can generate anywhere in the mouth and affect both adults and children.Learn more about diastema in:
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what event occurs at the end of the proliferative phase and the start of the secretory phase? what event occurs at the end of the proliferative phase and the start of the secretory phase? glandular secretions end. stratum functionalis is shed. ovulation occurs. menstruation begins.
Answers
At the end of the proliferative phase and the start of the secretory phase, menstruation begins.
During the proliferative phase, the endometrium thickens and prepares for potential implantation of a fertilized egg. If fertilization does not occur, the levels of progesterone and estrogen, which are hormones produced by the ovaries, decline. The decrease in hormone levels causes vasoconstriction of the blood vessels supplying the endometrium, leading to the shedding of the stratum functionalis.
As a result, the uterus undergoes contractions, and the shed endometrial tissue, along with blood and mucus, is expelled through the vagina. This is what is commonly referred to as menstruation or a woman's period. The process of menstruation typically lasts for several days.
Menstruation marks the beginning of a new menstrual cycle, and the shedding of the endometrium allows for the subsequent development of a new layer during the proliferative phase, preparing the uterus for potential implantation in case fertilization occurs.
Therefore, at the end of the proliferative phase and the start of the secretory phase, menstruation begins, involving the shedding of the stratum functionalis of the endometrium.
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how can energy from the motion of the crank on a hand-powerd flashlight produce heat?
Answers
Answer:
When you manually crank the flashlight, a coil of wire inside the generator converts the mechanical energy into electrical energy. This allows an electrical current to flow through the flashlight, thus lighting the bulb of the flashlight.
Answer:
It's called thermal energy. The energy that comes from the temperature of the heated essence is called thermal energy.
Explanation:
:) Hope this answer helped.
If
some energy depletion produces a positive change, does it follow
that more energy depletion is always better? why or why not
Answers
No, more energy depletion is not always better because there is a threshold beyond which excessive depletion can lead to negative consequences such as environmental degradation and imbalance in ecosystems.
No, it does not follow that more energy depletion is always better, even if some instances of energy depletion can produce positive changes.
Threshold Effect: Energy depletion can have positive effects up to a certain point. For example, extracting a limited amount of fossil fuels can provide energy for human needs. However, once the threshold is crossed, further depletion can lead to negative consequences such as environmental pollution, climate change, and resource depletion.Ecological Impact: Energy depletion often involves the extraction and utilization of natural resources, which can have detrimental effects on ecosystems. Increased depletion can disrupt ecological balance, harm biodiversity, and lead to the degradation of habitats and ecosystems.Sustainable Alternatives: Relying solely on energy depletion is not sustainable in the long run. It is important to shift towards renewable and clean energy sources that have minimal environmental impact, such as solar, wind, and geothermal energy. This reduces the need for further energy depletion and promotes a more sustainable energy future.Environmental Considerations: Energy depletion is often associated with negative environmental externalities, including air and water pollution, deforestation, and habitat destruction. These environmental impacts can have far-reaching consequences for human health and well-being.Therefore, while some instances of energy depletion may bring short-term benefits, it is crucial to consider the long-term sustainability and potential negative impacts. Striving for a balance between meeting energy needs and preserving environmental integrity is essential for the well-being of both current and future generations.
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Natural Selection is an evolutionary force that acts at phenotypic andgenetic level. At genetic level, which of the following statements iscorrect:Group of answer choices Selection increases the geneticdiversity in the population,Selection create new mutations (i.e.,new alleles) in the population,Selection decreases the geneticdiversity in the population,None of the above
Answers
Natural Selection is an evolutionary force that acts at the phenotypic and genetic level. At the genetic level, selection decreases the genetic diversity in the population.
Natural selection is a process that results in the survival and reproduction of the fittest organisms. This theory was introduced by Charles Darwin. Natural selection operates at both the genetic and phenotypic levels. At the genetic level, selection decreases the genetic diversity in the population.
Genetic diversity refers to the total genetic information available in a population. The more the genetic diversity, the greater the number of available options. Genetic diversity plays a vital role in the survival of a population in the face of environmental challenges.At the genetic level, natural selection acts by favoring some genes over others. Selection increases the frequency of beneficial genes that improve the fitness of the organisms. Selection, on the other hand, decreases the frequency of harmful genes that reduce the fitness of the organisms. This, in turn, leads to a decrease in the genetic diversity of the population. Hence, at the genetic level, selection decreases the genetic diversity .Phenotypic level refers to the physical expression of genes.
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Identify which kingdoms within Eukarya are known as decomposers, and which are capable of photosynthesis
Answers
Answer:
1.Fungi 2.plantae
Explanation:
Particularly in woods, fungi play a key role in decomposition. Some fungi, like mushrooms, have a plant-like appearance. However, fungus lack chlorophyll, a pigment that green plants employ to produce their own food using sunlight as fuel.
What is the similarity between plant and fungi kingdom?The ability of plants to produce their own sustenance makes this the most significant distinction between them and fungus.
As you probably already know, plants produce their own food using carbon dioxide, sunshine, and water.
Photosynthesis is the name given to this process. On the other hand, fungi are unable to produce their own nourishment.
Therefore, within eukarya fungi act as a decomposer and plant are capable of photosynthesis.
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Which of the following conditions or treatments would lead to a decrease in expression for a eukaryotic gene?
a) deacetylation of histones in the promoter of the gene
b) methylation of cytosines in the promoter of the gene
c) a mutation in the TATA box from TATA to GAGA
d) two of the above
e) all of the above
Answers
All of the mentioned conditions or treatments (a, b, and c) can individually result in a decrease in gene expression. correct answer is e) all of the above
All of the mentioned conditions or treatments can lead to a decrease in expression for a eukaryotic gene. Let's discuss each option:
a) Deacetylation of histones in the promoter of the gene: Histone deacetylation is associated with a more condensed chromatin structure, making the DNA less accessible to the transcriptional machinery. This can lead to a decrease in gene expression.
b) Methylation of cytosines in the promoter of the gene: Methylation of cytosine residues in the promoter region of a gene can also result in gene silencing. Methylated DNA attracts proteins that inhibit transcription, preventing the binding of transcription factors and RNA polymerase to the promoter.
c) Mutation in the TATA box from TATA to GAGA: The TATA box is a conserved DNA sequence in the promoter region that helps in the binding of transcription factors. A mutation in the TATA box can disrupt the binding of transcription factors, leading to decreased gene expression.
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omg can someone plz help me?
Which rock is not a metamorphic rock?
phyllite
shale
slate
Answers
Answer:
Shale is not a metamorphic rock it is actually a rock that is made during the process of making slate
Explanation:
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