Question

what can be concluded from the fossil record?
select one:
a. terrestrial organisms evolved from aquatic organisms slowly over long periods of time.
b. aquatic organisms do not share a common ancestor with terrestrial organisms.
c. aquatic organisms evolved slowly over long periods of time from terrestrial organisms.
d. terrestrial organisms emerged suddenly rather than gradually.

Explanation:

The fossil record timeline shows aquatic organisms (385 million years ago) transitioning through intermediate forms over 20 million years to fully terrestrial organisms (365 million years ago). This supports the idea of gradual evolution from aquatic to terrestrial life, contradicting options b, c, and d.

Answer:

a. Terrestrial organisms evolved from aquatic organisms slowly over long periods of time.