Which form of natural selection on polygenic traits results in the creation of two distinct phenotypes? A. Directional selection B. Disruptive selection C. Stabilizing selection D. Artificial selection

Answers

Answer 1

Answer:

Answer;

-Disruptive selection

Disruptive selection results in the creation of two distinct phenotypes.

Explanation;

-Disruptive selection is a type of natural selection that selects against the average individual in a population. The make up of this type of population would show phenotypes of both extremes but have very few individuals in the middle.

-The variance of the trait increases and the population is divided into two distinct groups. The disruptive selection will cause organisms with intermediate traits to reproduce less, and will allow those organisms with extreme traits to reproduce more.

Answer 2

Answer: I think it is
B.Disruptive selection.

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Which of the following statements is not true about the digestive system and its contribution to homeostasis? A. The digestive system helps to maintain the correct amounts of nutrients for the body tissues to do its job. B. The digestive system is responsible for monitoring the oxygen and carbon dioxide amounts in the blood and tissues. C. The digestive system breaks down food sources into the needed nutrients and deposits these nutrients into the blood for use by the cells. D. All of the above

A scientist is comparing the outer layer of an onion cell to the outer layer of a human skin cell. What is unique about the outer layer of the onion cell compared to the skin cell?

Answers

Answer:

contains cellulose.

Explanation:

The onion cell (and all plants for that matter) should have an extra layer around the cell known as the "Cell Wall" it offers more protection and helps support the plant. Human cells (and animal cells) do not have these cell walls they simply have a cell membrane while plants have both. also Plant cells are Square or rectangular while animal and human cells are round or ovalish in shape.

Systole is the ________ phase of the cardiac cycle. A. Contraction
B. Relaxation
C. Monitoring
D. Termination

Answers

B. Relaxation

Systole is the ________ phase of the cardiac cycle.
NOT:
A. Contraction
C. Monitoring
D. Termination

Systole occurs between s1 and s2 and after active filling fill 100% of the ventricles (caused by the sequential contraction created from the SA node). The increased pressure in the ventricles will cause the now lower pressured atrium valves to shut causing s1. Then with all valves closed this creates what is called an Isovolumetric contraction. This occurs when the SA node contraction will travel down the AV node which travels down the septum and eventually reaches the purkinje fibers and causes a simultaneous contraction and open the semilunar valves. This entire process occurs during the systolic phase.

An easy mnemonic to remember is diastolic which is the opposite of systolic sounds like it has the word "die" in it. Dying is when we usually relax and Diastole is the relaxation phase of the cardiac cycle. Systole would therefore be the contraction phase.

Which environmental hazard is directly related to nuclear power production?

Answers

Radioactive wastes and spent nuclear fuel are to be contained and isolated properly for a long period of time because when properly contained and controlled it pose dangers to the environment and the people with its very high radioactivity. One hazard it may pose to the environment is mutation.

The environmental hazard directly related to nuclear power production is the risk of radioactive contamination and potential nuclear accidents.

Which environmental hazard is directly related to nuclear power?

Nuclear power production involves the use of nuclear reactors to generate electricity. While nuclear power is a low-carbon energy source, there are unique environmental hazards associated with it. The primary concern is the potential release of radioactive materials into the environment.

Furthermore, the long-term storage and disposal of nuclear waste generated by nuclear power plants are ongoing environmental challenges. Radioactive waste materials remain hazardous for extended periods, requiring proper containment and management to prevent environmental contamination.

It's worth noting that with proper safety measures and regulations, the risks associated with nuclear power can be minimized. However, the potential for environmental hazards related to radioactive contamination and nuclear accidents is an inherent concern in nuclear power production.

Learn more about nuclear power at:

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What did Darwin notice about life on the Galápagos Islands?

Answers

Because of the isolation of Galapagos, the life forms that had somehow reached the island, such as the lizard and other such creatures, had evolved differently over time compared to their cousins on the mainland. Things like a bird that was usually able to fly no longer had long wings spans or the ability to fly on the island, the large lizards on the island were used to eating sea-vegetation and often swam right into the ocean using their long tails to swim. And so forth.

Darwin found that all the plant life and animals on the island developed from isolation. Each of these species were also different form the other species on the islands surrounding the Galapagos islands. Darwin could only explain these characteristics through a gradual transformation of the various species.

Organs are comprised of tissues that work together to perform a specific bodily function. a. True
b. False

Answers

True , several tissues works togather to form an organ

TRUE i know this for a fact

Each enzyme produced by the body isA. specific—meaning it is only able to catalyze a reaction with a certain molecule.
B.incomplete—meaning it requires other parts before it is able to bind to a molecule.
C. immature—meaning it cannot catalyze a reaction until many years later.
D. open—meaning it is able to catalyze a reaction with any molecule.

Answers

A an enzyme is very specific

Answer:

A. specific—meaning it is only able to catalyze a reaction with a certain molecule.

Explanation:

Study Island

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