The eastern gray squirrel exists in many different areas of the country, mostly in wooded areas. Some squirrels are black because of a genetic mutation. Based on the pictures, is this color mutation clearly beneficial or harmful to the
squirrel? Do environmental factors partially determine whether the mutation is beneficial? Explain your answer.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

1. desertification

2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

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