Endocytosis is a type of _______.
a. passive transport
b. facilitated diffusion
c. osmosis
d. active transport
d. active transport
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Chordin is an organizer protein found only in the dorsal regions of frog embryos. Removing chordin would most likely disrupt the determination of which structure?
A) central nervous system B) digestive system C) kidneys D) lungs
In the ZW system of sex determination (as in birds), a male is _____________ while a female is ______________
A. ZZ : ZW B. ZW : ZZ C. Z0 : ZW D. Z : ZW
The focus of ethology is on
A. genetic and physiological mechanisms of behavior. B. mammal behavior. C. bird behavior. D. the consequences of behavior. E. behavior in the field.
Oxygen atoms in H2O In photosynthesis, the oxygen atoms in H2O are energized.
a) reduced. b) reformed into other elements. c) oxidized. d) broken down.