Water flowing back and forth across the gills of fish is known as _____
a. capillary movement
b. counter current exchange
c. deoxygenation
d. pharyngeal movement
e. gill slits
ANSWER: b
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The lining of the mouth and anus originate from the ____, while the lining of the respiratory tract originates from the
____.
a. ectoderm; endoderm b. ectoderm; mesoderm c. endoderm; ectoderm d. endoderm; mesoderm e. mesoderm; endoderm
The region of the mantle below the crust is called:
a. the asthenosphere. b. the mantle. c. the lithosphere. d. the outer core.
Which term describes an estuary? a. Salt marsh b. All of these choices
c. Coastal wetland d. Mangrove wetland e. Marine nursery
Inversions suppress crossing over by providing a chemical imbalance because of breakpoints within certain genes
Indicate whether the statement is true or false