Every node in a phylogenetic tree represents a(n) ________
A) common ancestor
B) extinction event
C) transitional form
D) sister species
A
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Four of the following statements about cone snail venom are true. Which one is false?
a. It is a potential source of new drugs of medical interest. b. It may be lethal to humans. c. It immobilizes the cone snail’s prey. d. It is lethal to cone snail prey. e. Synthetic versions are used as a pain reliever in humans.
Nondisjunction of a single pair of autosomes can lead to all of the following except
A. euploidy. B. aneuploidy. C. trisomy. D. monosomy.
Which of the following bones is (are) NOT part of the axial skeleton?
A. sternum B. skull C. vertebrae D. scapula E. ribs
A ________ is a device used for growing mass cultures.
Fill in the blank(s) with the appropriate word(s).