2. Does microevolution typically happen over a long period of time or a short period of time?

1 answer:

7 0

Microevolution occurs over a relatively short period of time within a population or species. The Grants observed this level of evolution in Darwin's finches. Macroevolution occurs over geologic time above the level of the species.

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Which anatomical adaptation helps an elephant regulate its body temperature?

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I think the correct answer from the choices listed above is option A. The anatomical adaptation which helps an elephant regulate its body temperature are its large ears increase surface area so that more heat is lost by radiation. Heat can be released as they flap these ears. So there is your correct answer

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What friction affect how strong the electric force in between two charges object

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The answer is electric force!

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The hypothalamus __________. The hypothalamus __________. influences the function of only one lobe of the pituitary gland synthe

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Correct question:

The hypothalamus __________.

a) influences the function of only one lobe of the pituitary gland.

b) synthesizes all of the hormones produced by the pituitary gland.

c) regulates both reproduction and body temperature.

d) produces only inhibitory hormones.

Answer:

C) Regulates both reproduction and body temperature.

Explanation:

The hypothalamus is a small but important area in the center of the brain. It plays an important role in hormone production and helps to stimulate many important processes in the body and is located in the brain, between the pituitary gland and thalamus.

The hypothalamus’ main role is to keep the body in homeostasis as much as possible.

Homeostasis means a healthful, balanced bodily state.

The hypothalamus acts as the link between the endocrine and nervous systems to achieve this. It plays a part in many essential functions of the body such as: body temperature, thirst, appetite and weight control, emotions, sex drive, blood pressure and heart rate, production of digestive juices and balancing bodily fluids.

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Clear access routes into and out of chemical zones used to avoid contamination are called

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Access Control Points

They are restrictions points that enforce regulations and guidelines on decontamination when exiting the sites and ensuring adherence safety standards when entering the site. The regulation are usually, as standard practice, conspicuously posted at the Access Control Points.
Access Control Points are usually set up at the periphery of the Exclusion Zones, and ideally, there should be a separate entrance and exit Control Access Point.

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Hershey and Chase used radioactive isotopes to label different parts of the phage. They grew one batch of phage in the presence

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The sulphur would lable the capsule and the phosphorous the nucleic acid.

<h3><u>Explanation</u>:</h3>

Hershey and Chase experiment included growing of the pages in two batches, one in presence of 35S and other in presence of 32P. They then infected bacterial cells with these phages, cleaned them and then centrifuge the cells to isolate the marked elements in bacterial cells.

This was done to isolate which part of the phage is actually infective. Sulphur being a part of the proteins will mark the capsule whereas DNA having the phosphate bridges will be marked by 32P.

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