Which of the following would NOT be considered a vestigial structure?

a. fingernails

b. wisdom teeth

c. your appendix

d. Your tail bone

Why do viruses need living hosts, such as bacteria or eukaryote cells? a. The host cell is the source of food for the virus. b. Viruses depend on the host cells that they infect to reproduce. c.

Why might fatty acids, amino acids, and nucleic acids increase the hydrogen ion (H+) concentration of a solution? Explain your answer.

A lizard adjusts its body temperature when basking in the sun. It eats different types of insects. It lives on rocks and trees that match its coloration. Taken together, what do these processes describe?

Why does DNA replication have to occur before cell division? Explain what would happen if it did not occur

Two reasons that explain why organisms may go extinct

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.

A certain metabolic pathway can be diagrammed as, where a, b, c, d are the intermediates, and x, y, z are the enzymes that catalyze the reactions