As levels of body fat increase, leptin levels __________ and appetite is __________
a. increase; suppressed
b. increase; stimulated
c. decrease; stimulated
d. decrease; suppressed
D
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Anti-A and anti-B antibodies
A. are considered natural antibodies. B. are present at birth. C. are typically IgM. D. easily cross the placenta. E. are considered natural antibodies AND are typically IgM.
Adiabatic cooling reduces air temperatures by ____ oC per 1,000 m increase in altitude
a. 1 – 2 b. 2 c. 3 – 6 d. 8 – 10 e. 20 – 30
The __________ is a circular molecule of DNA that
resides in a region of cytoplasm called the __________. Fill in the blank(s) with the appropriate word(s).
The endosperm of a plant
a. is the food supply for the new sporophyte plant. b. is composed of haploid tissue. c. protects the young embryo within a seed. d. provides a connection between the ovary of a flower and a developing seed. e. produces sperm cells.