what makes a keystone species an important part of an ecosystem? what would happen to the biodiversity of an ecosystem if a keystone species were reduced or removed?
Answers
The ecosystem is held together by a keystone species. By maintaining population balance, it regulates the ecosystem's ability to function.
by using its actions to create a variety of habitats for other creatures. An ecosystem becomes unstable without a keystone species, and it eventually collapses. There is little functional redundancy in keystone species. This means that no other species would be able to fill the species' ecological niche if it were to vanish from the ecosystem. The environment would be forced to undergo a significant transformation, allowing for the influx of new, potentially invasive species. A keystone species is any animal, plant, fungus, or even bacteria that significantly alters its ecology. Due to the ability of their influence on other species to alter entire ecosystems, they play a significant role in their natural settings.
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Related Questions
Some people have proposed a new way to build houses in areas that are likely to experience tsunamis. In this design, a
house wouldn't have solid walls on all four sides. Instead, some of the wall areas would be replaced by substances that
water can travel through quickly, as shown in the diagram. How would this design help a house survive a tsunami? What
drawbacks might there be to this design?
Answers
Answer:
This could actually help. By doing this if the house is strong enough the water would go straight through the house just destroying furniture and anything else inside your house. This could also still hurt you the water could miss and still destroy your house so having this would have been a waste of money.
Explanation:
Your response will include…
2 parts that answer the following:
Why do cells divide?
How does surface area and volume factor into the cell’s need to divide?
Proper grammar with accurate punctuation, spelling and complete sentences.
At least 3-5 sentences.
Answers
to reproduce simply because they need to reproduce
Answer:
1. Cell divide for many reasons. For instance: when a person skins their knee, cells divide to replace old, dead or damaged cells. Cells also divide so living things grow, organism grow because cells are divided to produce more and more cells.
2. The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. When this happens, the cell must divide into smaller cells with favorable surface area and volume ratios or cease to function. This is why cells are so small.
Explanation:
I majored in Biology
Which statement about transcription and translation is true, with the +1 at or just downstream of the promotor. • Transcription begins at the +1 and translation begins downstream often at least 100 base pairs. • Transcription and translation both begin at the +1 • Transcription begins at the +1 and translation begins upstream from the +1 . • Transcription begins at the +1 and translation begins precisely 9 base pairs downstream of the +1
Answers
Transcription begins at the +1 and translation begins downstream often at least 100 base pairs.
The +1 is the start site for transcription, and it is located at or just downstream of the promoter. However, translation occurs after the mRNA transcript has been processed and exported from the nucleus to the cytoplasm. During translation, the ribosome binds to the mRNA and reads the codons in a 5' to 3' direction, starting at the AUG start codon. This start codon is usually located at least 100 base pairs downstream from the +1 site. Therefore, the statement that transcription begins at the +1 and translation begins downstream often at least 100 base pairs is true.
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wo linked genes, D and F, are separated by 10 CM. A woman with genotype DdFf marries a man who is ddff. The woman's father was DDFF. What is the probability that their first child will be ddFf? 10% 12.5% 45% 20% 5%
Answers
In a cross involving two pairs of linked genes, D and F, with a 10 CM separation, a woman with genotype DdFf marries a man with the same genotype. The woman's father had a genotype of DDFF. The question aims to find the probability that their first child will have the ddFf genotype.
The genotype of the man is ddff. It means that he carries two copies of the recessive allele (d) for gene D and two copies of the recessive allele (f) for gene F. The genotype of the woman's father is DDFF. It means that he carries two copies of the dominant allele (D) for gene D and two copies of the dominant allele (F) for gene F
The results of the cross show that there are four possible combinations of alleles in the offspring, namely, Ddff, Ddff, ddFf, and ddff. The genotype ddFf represents the desired outcome in the question. There is only one such possibility out of the four. Therefore, the probability of having an offspring with the ddFf genotype is 1/4 or 0.25. Hence, the answer is 20% (rounded to the nearest whole number).
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which term means pertaining to the thigh?
Answers
The term that means pertaining to the thigh is femoral.
Femoral is a term that used to describe anything related to the femur, which is the bone in the thigh. The femur functions as a means of propulsion of the human body at the bottom by transmitting the force of muscle contraction.
In medical terminology, the prefix "femor-" is used to indicate that something is related to the thigh or femur. For example, the femoral artery is the large artery that runs through the thigh, and the femoral nerve is the nerve that supplies sensation and movement to the thigh.So, if you see the term "femoral" used in a medical context, you can be sure that it is referring to something related to the thigh.
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Answer the following questions;
a) write 3 examples about reduction of complexity in simulation
b) how to describe models
c) give 3 examples to systems
d) how to classify systems
e) what is sytem analysis
f)how to check models
g) what is numerical simulation
h) explain MBS(multi body systems
i) what is optimization
Answers
Reduction of complexity in simulation can be achieved through abstraction, simplification, and optimization techniques.
How can models be described in simulation?Simulation models can be described using mathematical equations, algorithms, or graphical representations that capture the essential characteristics and behaviors of the system being simulated.
Examples of systems include an ecosystem, a manufacturing assembly line, and a transportation network.
Systems can be classified based on their complexity, behavior, and interdependencies. They can be categorized as simple or complex, deterministic or stochastic, and open or closed systems.
System analysis involves studying and understanding the components, interactions, and behavior of a system to gain insights, make improvements, or solve problems.
Model checking involves verifying the correctness, consistency, and validity of a simulation model by comparing its outputs or behavior with expected or desired outcomes.
Numerical simulation refers to the process of using mathematical models and algorithms to approximate and solve complex real-world problems or phenomena.
Multi-Body Systems (MBS) are mechanical systems consisting of multiple interconnected bodies or objects whose motion and interactions are governed by Newton's laws of motion.
Optimization refers to the process of finding the best or optimal solution to a problem by systematically exploring and evaluating different options or configurations based on defined criteria or objectives.
In summary, reduction of complexity in simulation can be achieved through techniques such as abstraction, simplification, and optimization.
Models in simulation can be described using mathematical equations, algorithms, or graphical representations.
Systems can vary from ecosystems to manufacturing assembly lines, and they can be classified based on various criteria. System analysis involves studying and understanding the components and behavior of a system.
Model checking is used to verify the correctness of simulation models. Numerical simulation uses mathematical models to solve complex problems.
Multi-Body Systems (MBS) involve interconnected mechanical bodies governed by Newton's laws. Optimization aims to find the best solution based on defined criteria.
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Which of the following microorganisms are NOT used in biotechnology as such? A. Bacteria B. Fungi C. Viruses D. Protozoans
Answers
\({ \tt{option \: (d)}} \: { \red{protozoans}}\)
Explanation:-
New organisms in biotechnology offer the possibility to detect novel products. It's good. But the role of protozoa in biotechnology has largely been ignored. We know that protozoa play important roles in treatment of com- munal and industrial wastewaters and some as parasites of man.
CAN BABIES M O A N?
DO THEY WHEN THEY WHINE?
SHSHCNNSJCN
Answers
Answer:
WHAT KIND OF QUESTION IS THIS and btw they whine
Explanation:
There are 2 types of crust - Continental and Oceanic.
True
False
Answers
Answer:
true
Explanation:
cuz it's true also trust me I've done my research.
Answer: True
Explanation: Earth's crust is generally divided into older, thicker continental crust and younger, denser oceanic crust. The dynamic geology of Earth's crust is informed by plate tectonics.
a sperm can survive 5 days in the female reproductive system. Identify the days during the menstrual cycle fertilization is possible
Answers
Answer:
The days it is possible is the days the women is ovulating or when the woman is mensturating
Explanation:
Only direct communication increases the animal’s
True
Or
False
Answers
Only direct communication increases the animal’s response is referrede to a true statement.
What is Communication?This is the process in which information is exchanged from one person to another and employs the use of their sense organs such as eyes and hears to receive the signals which are processed by the brain.
Direct communication also include the use of signals through body parts or touch which is usually understood and well interpreted for a particular purpose or cause.
This is therefore the reason why direct communication increases the animal’s response to different stimuli and is therefore regarded as the most appropriate choice.
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question 7 electroencephalography measures changes in: blood oxygenation levels generated by large numbers of neurons. glucose metabolism generated by large groups of neurons. voltage generated by large groups of neurons. voltage generated by single neurons.
Answers
Electroencephalography (EEG) is a technique for measuring brain activity that involves putting electrodes on the head.
EEG recorded at the scalp is non-invasive; nevertheless, intra-cranial EEG may be obtained by monitoring activity directly at the exposed cortex. EEG is inexpensive and (relatively) simple to perform. Each scalp electrode measures electric currents (or potentials) generated in cortical tissue comprising roughly 30-500 million neurons and records electrical activity at vast scales.
Magnetoencephalography (MEG) is a technique that measures the magnetic fields produced by electric currents in the brain. Magnetic field measurements range from femto-tesla to pico-tesla. MEG gives a highly precise precision of neural activity time. This is a non-invasive examination.
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Please describe this picture using directional terminology, body planes and body movements.
Answers
The human body is a complex organism and understanding its structure and functions requires a thorough knowledge of directional terminology, body planes, and body movements. In this image, we can see a person performing a side plank exercise which is an effective core-strengthening exercise.
We can also use directional terminology to describe the person's movements. The person is performing a lateral flexion to the side while maintaining an isometric contraction of the core muscles. The movement involves the transverse axis of the body, which runs from front to back, perpendicular to the frontal plane.
In conclusion, this picture shows a person performing a side plank exercise, positioned on the frontal plane and performing a lateral flexion movement. The person is using their core muscles to maintain the position while one arm is supporting their weight and the other arm is extended towards the ceiling.
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What type of mutation occurred to cause the light moth phenotype?
Answers
Evolution of a natural selection is a type of mutation occurred to cause the light moth phenotype.
what is natural selection?Natural selection is the variation in individual survival and procreation brought on by phenotypic variances. The evolution of a population's heritable features across generations is a crucial mechanism of evolution.
Natural selection is a process in which more environment-adapted organisms tend to survive and reproduce more frequently than less environment-adapted ones. For instance, birds and snakes occasionally consume treefrogs.
What are the 4 types of natural selection?Selection Stabilization.Directional Selection, type 2.Diversifying Selection is Type 3.Sexual selection is Type 4.Predator-Prey Selection Type 5learn more on natural selection
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The monthly flow of tissue and blood as a self-cleansing process in females is called __________.
Answers
The monthly flow of tissue and blood as a self-cleansing process in females is called menstruation which is the regular passage of blood and mucus via the vagina from the uterus's inner lining. The menstrual cycle is characterized by unique hormonal changes. Falling progesterone levels cause menstruation, which is a sign that pregnancy has not yet happened.
Menarche, the start of the first period, often occurs between the ages of 12 and 15. Even at the age of 8, menstruation would still be regarded as natural. In general, first period onset occurs later and earlier in underdeveloped countries than in developed ones. In young women, the usual interval between the first day of one period and the first day of the following is 21 to 45 days.
In adults, the range is 21 to 31 days, with 28 days being the norm. Bleeding often lasts between two and seven days. Typically, periods do not start up again during the first several months of breastfeeding after stopping during pregnancy. After menopause, which typically occurs between the ages of 45 and 55, menstruation ceases to occur.
Up to 80% of women report having no issues severe enough to interfere with everyday activities either during menstruation or in the days preceding menstruation. Premenstrual syndrome refers to symptoms before menstruation that do interfere with daily life (PMS). 3 to 8% of women who have PMS endure severe symptoms, which affect 20 to 30% of women. These consist of pimples, sore breasts, bloating, fatigue, irritability, and mood swings. Other signs and symptoms experienced by some women include painful periods, heavy menstrual bleeding, and unusual bleeding at any time during the menstrual cycle. When periods do not start by the age of 15 or have not started again in 90 days, this condition is referred to as amenorrhea.
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why do living organisms need...
a)food
b)energy
c)matter
Answers
Answer:b
Explanation:
The organism needs energy to order to reproduce growth and food. Without the energy none of the organism is alive.
Glycolysis does not require oxygen to occur in cells. However, under anaerobic conditions, glycolysis normally requires fermentation pahtways to occur to continue to produce ATP. Which best describes why glycolysis is dependent on fermentation under anaerobic conditions?
a. Glycolysis requires fermentation to produce more glucose as a substrate
b. Glycolysis requires fermentation to generate pyruvate for a later step in the pathway
c. Glycolysis requires fermentation to synthesize lactic acid and restore NADH to NAD+
d. Glycolysis requires fermentation to generate ATP molecules to complete the early steps of the pathway
Answers
What is the density (in g/mL) of a 5.00 mL urine sample from a patient suffering from symptoms resembling those of
diabetes mellitus if the mass of the urine sample is measured to be 5.025 g?
O 0.995 g/mL
O 0.9950 g/mL
O 1 g/mL
O 1.00 g/mL
O 1.01 g/mL
Answers
The density (in g/mL) of the urine sample is 1.005 g/mL.
Density of a urine sample
The density (in g/mL) of a 5.00 mL urine sample from a patient suffering from symptoms resembling those of diabetes mellitus if the mass of the urine sample is measured to be 5.025 g can be calculated as follows:
Mass of urine sample = 5.025 g
Volume of urine sample = 5.00 ml
Density of urine sample is defined as mass per unit volume. The formula for density is as follows:
Density = mass/volume
= 5.025 g/5.00 mL
= 1.005 g/mL
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A normal polypeptide includes the following sequence of amino acids. (Note: Each amino acid is named by a three-letter abbreviation.)
val his leu thr pro glu glu).
After a mutation, the amino acid sequence becomes the following:
val his leu thr proval glu
O
Is the mutation that occurred more likely to have been a substitution or an insertion? Explain your answer.
Answers
Answer:
Based on the information provided, the mutation that occurred is more likely to have been an insertion rather than a substitution.
The original polypeptide has a sequence of six amino acids at the end that reads "glu glu," while the mutated polypeptide has an additional amino acid, "val," inserted between "pro" and "glu." This suggests that an extra amino acid was added to the sequence rather than one being substituted for another.
Substitutions involve the replacement of one amino acid with another, whereas insertions involve the addition of one or more amino acids to the sequence. In this case, the presence of an extra amino acid in the mutated polypeptide sequence indicates that an insertion mutation occurred.
Explanation:
Look around and write down the name and symbol of elements that are present in your classroom.
Answers
Answer: Batteries, Lead Pencils and Electrical wires
Explanation: Lithium (Li) atomic no.3 is present in batteries. Lead pencils are made of graphite which is a form of carbon(C) atomic no.6. Electrical wires are made up of copper (Cu) atomic no.29
What surrounds the cytoplasm of all cells?
Answers
Charles Darwin concluded that the 13 species of finches on the Galapagos islands:A. all adapted to the same predators in different ways.B. All of these.C. probably evolved from one single ancestral species from the mainland.D. are identical to species on the mainland.
Answers
The correct answer is C. probably evolved from one single ancestral species from the mainland. Darwin realized that Finches differed form their relatives in mainland. The finches he saw were all particular on their own, so he concluded that their isolation from mainland and their insular habitat make them to evolve different traits, eventually each finch become a different species.
How does the formula for cellular respiration compare with the formula for photosynthesis?
Answers
Where do the Calvin Cycle réactions take place?
A. In the Thylakoid membrane of the chloroplast
B. In the grana of the chloroplast
C. In the stroma of the chloroplast
Answers
Answer:
c in the stroma of the chloroplast sir
Inherited traits of individuals are governed in the genetic material found in the genes within chromosomes in the nucleus. This diagram shows the genetic basis of inherited traits. In the diagram D is a chromosome. What can you infer about the relationship of genes, chromosomes, and DNA? Select ALL that apply.
Answers
Based on the given information in the question, we can infer the following relationships between genes, chromosomes, and DNA:
Genes are located on chromosomesChromosomes contain DNAWhat are Inherited traits?Genes are located on chromosomes: Genes are specific sequences of DNA that are located on chromosomes, which are thread-like structures made up of DNA and proteins found in the nucleus.
Chromosomes contain DNA: DNA is the genetic material that is found within the chromosomes in the nucleus of a cell. It is a long, double-stranded molecule that carries the genetic information required for the development and function of living organisms.
Therefore, we can infer that genes are specific sequences of DNA that are located on chromosomes, which are thread-like structures made up of DNA and proteins found in the nucleus.
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You are requested to implement a simple virus management system. " A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea." Viruses can be classified into various categories according to the Baltimore classification (see link for more details). Any virus can be identified by many fields including an official name, date when it was first discovered, who discovered, ... 1- (1 mark) Describe the virus and research Lab data types, Virus and ResearchLab, using Java classes. Make sure to use Java inheritance, an interface, and an abstract class. 2- (4 marks) We want to implement a simple application that manages the viruses stored in research Labs. You are asked to develop a Java application that uses an array to store all information regarding the viruses maintained in each research Lab and using the newly created data types: Virus and ResearchLab defined in 1). You should provide a menu with the following options: Virus Management System (CSC301, Fall2022) 1- Create a new Research Lab 2- Add a new Virus to a research Lab 3- List all research Labs storing a particular virus 4- Delete all existing viruses from a given a category in a research Lab 5- Check if a particular virus exists based on its official name 0- Quit Your choice? Please use the partial Java code provided with this assignment which prints the menu.
Answers
The virus data type can be implemented as a Java class with properties such as the official name, discovery date, and discoverer. The research lab data type can be implemented as a subclass of the virus class, inheriting its properties and methods.
To represent the virus data type in Java, we can create a Virus class that includes fields to store information such as the official name, discovery date, and discoverer. This class can serve as the base class for other virus-related classes.
For the research lab data type, we can create a ResearchLab class that extends the Virus class. This inheritance allows the ResearchLab class to inherit the properties and methods of the Virus class while also providing additional functionality specific to research labs.
Using Java inheritance, we can establish a hierarchical relationship where the ResearchLab class inherits the characteristics of the Virus class. This promotes code reuse and allows us to organize the codebase efficiently.
By implementing the virus and research lab data types using Java classes and inheritance, we can effectively represent and manage viruses and research labs in a structured manner within the virus management system.
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59:52 In an oil spill, why does the oil not mix with the seawater?
Answers
Answer:
The oil does not mix with the water since it has a lower density so it floats on it
Explanation:
please help !!
How have advances in medicine and technology affected population growth?
A. They have increased birth rates and lowered death rates.
B. They have lowered birth rates and lowered death rates.
C. They have not affected birth rates or death rates.
D. They have caused an abrupt decline in the human population.
Answers
Answer:
B
Explanation:
They have lowered birth rate and lowered death rates
True/False: Epinephrine is released more quickly into the blood than is cortisol during stress because the adrenal medulla is innervated directly by neurons whereas the adrenal cortex receives signals from a hormonal cascade.
Answers
As nervous regulation is comparatively faster than hormonal regulation, the given statement is True.
Epinephrine is released by the chromaffin cells of adrenal medulla. The adrenal medulla is a modified form of sympathetic ganglia, and the chromaffin cells are similar to sympathetic postganglionic neurons. Thus, upon stimulation by sympathetic preganglionic neurons, chromaffin cells release epinephrine directly into blood.
Corticotropin-releasing hormone (CRH) released from hypothalamus stimulates the anterior pituitary to release adrenocorticotropic hormone (ACTH) which stimulates the adrenal gland to secrete cortisol.
Thus, as epinephrine release is regulated by sympathetic nervous system and cortisol release is regulated by hormonal regulation, epinephrine is released quickly than cortisol.
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How can insects help recover DNA evidence?