Question

question 8
paleontologists have recovered and studied the fossil remains of thousands of ancient organisms. how do fossils provide evidence for evolutionary changes?
select one:
○ a. fossils show how todays life - forms are similar to organisms of the distant past.
○ b. fossils demonstrate that all organisms, past and present, have bones.
○ c. fossils show that the size of organisms has not changed drastically over time.
○ d. most fossils reveal the complete genome of an organism.

Explanation:

• Option b is incorrect because not all organisms have bones (e.g., soft-bodied organisms like jellyfish have left fossil traces in some cases, but many lack bones entirely).
• Option c is incorrect because fossils show that organisms have changed drastically over time (e.g., the transition from small, simple organisms to complex life forms like dinosaurs and mammals).
• Option d is incorrect because fossils rarely preserve complete genomes; most only preserve hard structures like bones, shells, or impressions of soft tissues.
• Option a is correct because fossil records allow comparison between extinct ancient organisms and modern life forms, showing shared traits and evolutionary links that demonstrate how present-day species are related to and evolved from past organisms.

Answer:

a. Fossils show how today's life-forms are similar to organisms of the distant past.