1. Discuss how the study of fossils provides strong evidence for evolution. (13.2 and 13.3)

in fossils we see homologous structures that suggest a common ancestor.

By looking at the bones of the arms and comparative anatomy we see the similar structure and function that is retained.

When looking at other animals like birds we see Analogous structures that look similar but have a different function (flying).

Finally we see Vestigial structures which are structure that no longer function as they once were used for. An example of this is the coccyx (tail bone in humans) compared to tails in dogs, cats, monkeys, etc.

Explanation:

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.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above