What is the primary function of the post-anal tail in aquatic vertebrates?

a. balance
b. courting
c. locomotion
d. communication


c. locomotion

Biology & Microbiology

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Which of the following is not a major functional class of proteins?

A) trifunctional proteins B) enzymes C) motility proteins D) regulatory proteins E) structural proteins

Biology & Microbiology

A pathway for cell growth control is conserved between Drosophila and humans, indicating that the pathway is ____

a. also found in prokaryotes b. also found in all animals c. at least 800 million years old d. at least 3.8 billion years old e. at least 8 million years old

Biology & Microbiology

What do gymnosperms and angiosperms have in common?

A. Flowers B. Spores C. Seeds D. None of these

Biology & Microbiology

How many different types of amino acids are found in proteins?

A) 4 B) 1,000 C) 200 D) 100 E) 20

Biology & Microbiology