____ allow(s) land animals to exchange gases with air across a moist surface
a. Gills
b. Moist skin
c. A digestive system
d. Lungs
e. Nasal passages
ANSWER: d
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Cadherins (select all correct choices):
A. are cell adhesion molecules found in cellular junctions at cell surfaces. B. are calcium-dependent proteins involved in attachment of cells to neighboring cells. C. are calcium-dependent proteins involved in attachment of cells to the extracellular matrix. D. are highly diverse, and each type can only bind to a complementary cadherin type.
A scientist might create a conditional knockout of a mouse gene when
A) a homozygous loss-of-function mutation in the gene causes embryonic lethality. B) a homozygous loss-of-function mutation in the gene produces a wild-type phenotype. C) a homozygous loss-of-function mutation in the gene affects only ears. D) a homozygous loss-of-function mutation in the gene affects only coat color.
Pinocytosis would allow the intake of
A. solid food. B. gas. C. molecules dissolved in water. D. All of these answers are true.
Total amount of kinetic energy DUE TO molecular motion is ____________
Fill in the blank(s) with the appropriate word(s).