Answer:
The correct answer is keystone predator.
Explanation:
In sustaining the composition of an ecological community, a keystone species plays an essential function. In the absence of keystone species, the ecosystem would fail to exist and would become drastically different. A predator is a classic illustration of a predator, which inhibits a specific herbivorous species from eradicating the dominant species of plants. In the non-existence of predators, the herbivorous prey would increase enormously and would clean the entire essential plant species, and thus, drastically change the significance of the ecosystem.
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Each trait a person has, such as eye or hair color, is ultimately the result of a single allele in DNA.
True
False
Answer:fałsz
Explanation:
Answer:
False
Explanation:
I just took the test
Which statement correctly identifies the types of macromolecules that are described?
Answer:
macromolecules are the molecules that we can not see by the eye
Explanation:
What should I do more, that's all I know about macromolecules
1. Much of the behavior of all primates is learned. Nonetheless, we have suggested many times that primate behavior has been shaped by natural selection. How can natural selection shape behaviors that are learned
Answer:
Nature selects best suited organisms having behaviours that help in the survival of organisms in that environment.
Explanation:
Natural selection can shaped the behaviors that are learned by the organisms because these behaviours helped organisms in their survival. Those organisms will be selected by the nature which can withstand the changing environmental conditions. Organisms adopt different behaviours in order to survive harsh environmental condition and these behaviour shaped by the natural selection in that organism so that they survive and grow in that environment.
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Label the permeable and impermeable rock layers
Answer: HI your question is incomplete but i will provide a general answer that can help you
answer : Permeable Rock layers allow the flow of fluid like substances through them, While Impermeable rock layers do not allow the flow of fluid like substance through them.
Explanation:
Permeable rocks are rocks containing pores through Fluid like substances can penetrate through in the rocks. examples of Permeable rocks are ; Sandstones and Chalk
While an Impermeable rock is a rock that does not allow the flow of fluid like substance through it due to the absence of pores in its rock layers . examples of such rock are ; Clay and marble
Although some permeable rocks might exhibit low level of permeability as well but generally Rock sample with pores are classified as permeable rock layers.
1. A brown mink crossed with a silver-blue mink produced all brown offspring. When these F1 were crossed among themselves, they produced forty-seven brown animals and fifteen silver-blue animals. What are the genotypes of the parentals and the F1s
Answer:
The correct answer is -
Parental - BB and bb
F1
Genotypes: 100% Bb
F2
Genotypes: ¼ BB, ½ Bb, ¼ bb
Explanation:
It is given that a cross between a brown and a silver-blue mink produces all brown offspring and it is only possible if brown is dominant over silver blue in true breed cross, assume brown trait is represented by B and silver-blue is b then parents will be
BB and bb
B B
b Bb Bb
b Bb Bb
Cross between F1 individuals: Bb cross Bb
gametes : B, b and B, b
B b
B BB Bb
b Bb bb
the genotype of F2 : 1:2:1 = ¼ BB, ½ Bb, ¼ bb
Red-green color blindness is a human X-linked recessive disorder. Jill has normal color vision, but her father is color blind. Jill marries Tom, who also has normal color vision. Jill and Tom have a daughter who has Turner syndrome and is color blind. a. How did the daughter inherit color blindness
Answer:
From her mother's (Jill's) father.
Explanation:
An electric current is generated when a coil of wire passes through a magnetic
field. A device for detecting this current is a
1 generator
2 turbine
3 calorimeter
4 galvanometer
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What happens to animals because of plastic trash in the ocean ?
Answer:
They suffocate and choke because of the plastic waste, they also feel trapped in there and sometimes smaller animals get stuck in there
Answer:
Fish, seabirds, sea turtles, and marine mammals can become entangled in or ingest plastic debris, causing suffocation, starvation, and drowning. ... Plastic waste kills up to a million seabirds a year. As with sea turtles, when seabirds ingest plastic, it takes up room in their stomachs, sometimes causing starvation.
Explanation:
Trace how the brain responds to stimuli through the nerves and neurons.
Answer:
The correct answer is -The brain and the spinal cord respond and sends a signal down a motor neuron to a specific sensory stimulus.
Explanation:
Sensory receptors sense the changes that take place in the environment that is called stimuli by sensory neurons that transmit the signal from the sensory receptors to the brain.
The brain and the spinal cord make the central nervous system. This coordinates a response to a specific stimulus and sends a signal down a motor neuron and send a signal to the effector by motor neurons.
Light penetrates the clear water of the open ocean more deeply than it does lake
water. Phytoplankton is found deeper in the open ocean than in freshwater lakes.
What does this observation best indicate?
A Phytoplankton provides nutrients to consumers in the ecosystem.
B Phytoplankton reduces the light available to organisms at lower depths.
C Phytoplankton populations are limited by their ability to photosynthesize.
D Phytoplankton population growth is limited by the presence of marine salts.
The given observation best indicates that the phytoplankton provides nutrients to consumers in the ecosystem.
What do you mean by Ecosystem?An ecosystem may be defined as a place or an area where organisms of different species are present together and interact with one another for their need.
Phytoplanktons belong to lower trophic levels in the aquatic ecosystem. The organisms of higher trophic levels depend on it for the need of energy.
Therefore, the given observation best indicates that the phytoplankton provides nutrients to consumers in the ecosystem.
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Which of the methods of generating electricity shown below does NOT use alternative energy resources?
Answer:
A.Please leave a 5-star rating and Thanks!An Inflammatory response typically includes: Group of answer choices increased activity of phagocytes in an inflamed area inhibiting the release of white blood cells from bone marrow release of substances to decrease the blood supply to an inflamed area reduced permeability of blood vessels to conserve plasma
Answer:
increased activity of phagocytes in an inflamed area
Explanation:
An inflammatory response is the way the body defends itself against attacks by microbes, physical or chemical agents. In other words, this is how organisms defend and inhibit damage from attacks. The inflammatory response allows high phagocyte activities in the inflamed area. Phagocytes are immunity-related cells that attack foreign and invasive substances, bacteria and dead cells.
Anything that causes disease is called a
O virus
O protist
O pathogen
O gene
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Answer:
nnnoooo
Explanation:
The age of rock as determined by the other rock surrounding it is known as ______________.
A) absolute age
B) carbon dating
C) Law of Superposition
D) relative age
Answer:
B)CARBON DATING
Explanation:
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EXPLAIN THIS IS A WRITTEN ANSWER
Briefly explain why fossil fuels are good sources of fuel. In other words, where does the energy come from?
3) Part of a process necessary for reproduction in complex organisms is represented below. Step C results in the production of A) four zygotes that will develop into embryos B) embryonic cells that could unite and develop into an organism C) four cells that will recombine to form two offspring D) gametes that could be involved in the formation of a zygote
Part of a process necessary for reproduction in complex organisms is explained below, and the correct options are gametes that could be involved in the formation of a zygote, which is in option D.
What is a zygote?Reproduction in complex organisms involves a process called sexual reproduction, which involves the fusion of gametes from two parents, such as the male making the sperm and the female making the ovum, and then the zygote is formed. In the case of humans, this zygote develops into a baby after 9 months.
Hence, the correct options are gametes that could be involved in the formation of a zygote, which is in option D.
Learn more about the zygote here.
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The question is incomplete, the complete question is below
Part of a process necessary for reproduction in complex organisms is explained below and choose the correct option,
A) four zygotes that will develop into embryos
B) embryonic cells that could unite and develop into an organism
C) four cells that will recombine to form two offspring
D) gametes that could be involved in the formation of a zygote
Which rock layer is probably the oldest?
A.
3
B.
5
C.
2
D.
4
Answer:
3
Explanation:
Answer: 4
Explanation: THE OTHER ANWSER IS WRONG
What is thought to have caused the ice ages?
A) Earth's precession
B) Earth's tilt
C) Earth's rotation
D) Earth's magnetic field
Answer:
A) Earth's precession
Explanation:
Earth's precession is the movement of Earth that acts like a cone.
Earth has three movements: rotation, revolution and precession.
(equinoctial precession)
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Which best describes an abiotic factor?
O A living part of the environment
O A non-living part of the environment
Answer:
B. Abiotic factor are non living part of the environment.
Explanation:
Biotic factors are the living factors . Abiotic factor is the non living factor.
Which of the following factors may contribute to a population maintaining Hardy-Weinberg equilibrium
A There are no mutations in the DNA of the population.
B There are individuals migrating into or out of the population.
C The population is interbreeding with another species.
D The population size is very small.
Answer:
1. There are no mutations in the DNA of the population.*
2. The brown color is an adaptation that is being selected by the environment.
3. The number of individuals displaying each phenotype in both the current generation and the offspring.
4. The recessive phenotype in this population may serve as an adaptation in this environment.
5. A population of turtles that routinely breeds with another closely related species of turtle.
Explanation:
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Distribution of Traits Quick Check
The factor that may contribute to a population maintaining Hardy-Weinberg equilibrium is there are no mutations in the DNA of the population. So, the correct option is A.
What do you mean by Mutation?The sudden, stable, and inheritable changes in the genetic material of an organism, are called mutations.
There are some assumptions of Hardy-Weinberg equilibrium. They are.
The population is large.The members of the population mate randomly with each other.No migration occurs between populations.No new mutations are favorable. No survival or reproductive advantage.Therefore, the factor that may contribute to a population maintaining Hardy-Weinberg equilibrium is there are no mutations in the DNA of the population.
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in a school 58% of the total number of students are boys in the number of girls is 814 how many number of students are in the class
Answer:
See below.
Explanation:
Given that 58% of the students are boys, 42% must be girls.
42% = 0.42.
x = unknown number of students
0.42x = 814
x = 1938 (about equal to)
When hydrogen is burned, it reacts with oxygen and produces
O carbon dioxide
O water
O oll
O hellum
What does the flagella do in a euglenoid?
Answer:
Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor. The flagellum is located on the anterior (front) end, and twirls in such a way as to pull the cell through the water. It is attached at an inward pocket called the reservoir.
What are the reasons why people are challenging the relevance of the Voting Rights Act today? Do you agree or disagree with these reasons?
what is shown on the y-axis in this figure variation within treatment
Explanation:
Temperature is shown on y-axis
Read the following scenarios carefully and explain how natural selection will occur in each.
Some worms eat at night (meaning they are nocturnal) and some worms eat during the day (meaning they are diurnal). Most birds eat only during the day, so they are only eating diurnal worms, due to the fact that the nocturnal worms are burrowing during this time. Each spring when the worms reproduce, about 500 offspring are born but only 100 of them live long enough to reproduce themselves.
Answer:
The correct answer is - Noctural worms have the advantage over diurnal due to the fact that the nocturnal worms are burrowing during the feeding time of birds.
Explanation:
Natural selection is the process in which organisms adapt according to environmental changes to increase their survival rate. Natural selection leads to natural changes in different organisms.
In this case, diurnal worms are forced by the natural selection here to adapt to the change if they want to survive. Here, natural selection works for the nocturnal and against the diurnal.
Fire and Mello conducted an experiment where they added no gene X RNA (b), anti-sense gene X RNA (c) or double stranded gene X RNA (d) to C. elegans embryos. They then did a hybridization experiment examining gene X mRNA levels in the embryo. Square (a) is a no probe control. How does this act as a control
Answer:
The correct answer is - It shows that an RNA probe is necessary to get a signal.
Explanation:
A probe is a specific single-stranded sequence of DNA or RNA that recognizes its complementary sequence in a particular sample genome for synthesis. The RNA probe is placed into close contact with the given sample under a specific environment that allows the RNA probe sequence to hybridize with its complementary sequence.
In this case, square a is the condition where no RNA probe is persent whereas all three other conditions have some sort of RNA probe, however, in C there is no Gene X probe but their probe present. To get a signal in hybridization RNA probe is required and that can be used as control as it can be used to compare if a signal is received or not.