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Anna [14]
4 years ago
7

The modern theory of evolution states that a basis for variation within a species is provided by

Biology
1 answer:
Likurg_2 [28]4 years ago
7 0
The modern theory of evolution states that a basis for variation within a species is provided by mutations.  It plays an important role in evolution. The best source of all genetic variation is mutation. It is important as the first step of evolution<span> because it creates a new DNA sequence for a particular gene, creating a new allele.</span>
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Which are examples of how the hypothalamus directly regulates endocrine activity?
Stells [14]

Two hormones are produced and kept in the posterior pituitary gland. generating control chemicals that either stimulate or inhibit the anterior pituitary gland. encourages the release of essential hormones from the adrenal cortex.

By releasing particular regulatory hormones, the hypothalamus regulates the anterior lobe of the pituitary gland's ability to produce hormones. Hypothalamic neurons produce regulatory substances into the interstitial fluids around the median eminence, swelling close to the infundibulum's connection. The pituitary gland, which produces and distributes additional critical hormones throughout the body, collaborates with the hypothalamus. The hypothalamus and pituitary gland jointly regulate a large number of the body's hormone-producing glands, collectively known as the endocrine system. The thyroid, gonads, and adrenal cortex.

Learn more about the pituitary gland here:-

brainly.com/question/12499901

#SPJ1

6 0
2 years ago
If hydrophilic heads only attract other hydrophilic heads, describe which substances would be able to get through the membrane e
murzikaleks [220]

Answer:

polar substances

Explanation:

polar substances are hydrophilic

4 0
4 years ago
Which statement is true about a scientific theory?
stellarik [79]

Answer:

Theories can be revised as new knowledge expands our understanding.

Explanation:

A scientific theory is based on observations and logic that provide a valid answer to the question related to the world.

Scientific theories can be revised and change over time when a person encounters with new knowledge and helps to expand our understanding. Changes in scientific theories are the result of new scienctific observations and deep investigation about the context. The old theory can be revised as  a new theory become dominant over old and gives a new perspective to people.

Hence, the correct answer is "Theories can be revised as new knowledge expands our understanding."

4 0
3 years ago
You are working in a clinical laboratory and you need to examine an unstained urine sample for the presence of bacteria. what ty
sasho [114]

hello there

the answer is Essay

thank you

hope this helps

4 0
4 years ago
A major reservoir for oxygen is the atomosphere. Which of the following processes adds oxygen to the atmosphere?
Alex Ar [27]
Photosynthesis adds oxygen to the atmosphere
6 0
4 years ago
Read 2 more answers
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