Which substance is a typical source of nutrients and water for developing amniote embryos?
a. squalene
b. bone
c. keratin
d. collagen
e. albumin
ANSWER: e
Biology & Microbiology
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A stamen is
a. composed of a stigma, a style, and an ovary. b. the mature male gametophyte. c. the site where microspores are produced. d. part of the vegetative phase of an angiosperm. e. none of these.
Biology & Microbiology
A chemical reaction requires energy to proceed. This would be
A) exothermic. B) endothermic. C) entropy. D) kinetic energy.
Biology & Microbiology
In convergence, a single neuron is controlled by signals from two or more presynaptic neurons
____________________ Indicate whether the statement is true or false.
Biology & Microbiology
Eggs and larva are developmental forms of various parasites called ________.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology