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Sidana [21]
3 years ago
10

The theory of natural selection occurs in 4 steps. Overproduction, Variation,

Biology
1 answer:
sergejj [24]3 years ago
7 0
Overproduction, Variation, Selection and COMPETITION.
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When your Math teacher was handing out the test, you noticed that your respiration rate and heartbeat increased, your palms got
Papessa [141]

Answer:

My pretest behaviors were triggered by the sympathetic nervous system, while my body returned to its normal state by the way of the parasympathetic nervous system, after the test.

Explanation:

The sympathetic nervous system and the parasympathetic nervous system are part of the autonomic nervous system. The main function of the autonomic nervous system is to regulate the heart, kidneys, and liver which are not under voluntary control. The regulation of the body’s unconscious actions is executed through the sympathetic and the parasympathetic nervous system.

Upon exposure to stressors or threats, the sympathetic nervous system is triggered. Epinephrine and norepinephrine are then released, causing acceleration of the heart, constriction of blood vessels, increase in blood pressure, profuse sweating and other related responses against stress. The sympathetic nervous system controls all these involuntary responses that could be termed “fight-flight-or-freeze” response.

On the other hand, the parasympathetic nervous system initiates what is termed “rest and digest” response, which occurs immediately after the “fight-flight-or-freeze” phase response to stress is over. The body is returned to its normal state by the parasympathetic nervous system. The parasympathetic nervous system releases acetylcholine, which regulates the function of the body during a period of rest or recuperation.  

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3 years ago
Stockmanship meaning in your own words and example
tiny-mole [99]

Stockmanship is a term more common in the beef cattle industry and can be defined as the art and science of handling cattle, or any other farm animal, properly.

6 0
2 years ago
DNA is often referred to as a genetic blueprint. In the same way that blueprints contain the instructions for construction of a
harina [27]

Answer:

Genetic code

Cadons

Explanation:

genetic code is the code that allows an organism read the information in it genes. The information provide instructions for building and operating a living organism.

The genetic code is a combination of sequential nitrogen base A, G, U, C formed in the mRNA chain. These four bases is what make of the letters of the genetic code which combine together to form the cadons

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3 years ago
Question 28 (1 point)
quester [9]
B. xylem and phloem. they transport water and nutrients throughout the plant
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4 years ago
All cells have a ____ surrounding them
Mrrafil [7]

All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma membrane, or cell membrane, is the phospholipid layer that surrounds the cell and protects it from the outside environment. Ribosomes are the non-membrane bound organelles where proteins are made, a process called protein synthesis.

8 0
3 years ago
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