Sponges often compete with other organisms for:
a. food.
b. space.
c. light.
d. nutrients.
e. mating.
B
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The number of allele pairs that assort independently in an organism is generally much higher than the number of chromosome pairs. This phenomenon is due to
A. independent assortment. B. segregation. C. crossing over. D. sex-linkage. E. chromosome inactivation.
The cardiac, pyloric, anal, and ileocecal sphincters are all part of the
(a) digestive tract. (b) respiratory tract. (c) circulatory system. (d) muscular system.
A lake is usually _____ and _____ than a pond.
A. larger; deeper B. smaller; shallower C. smaller; deeper D. saltier; warmer E. larger; shallower
In mammals, oxytocin is released during _____
a. sexual intercoursek only b. lactation only c. labor only d. sexual intercourse, lactation, and labor e. sexual intercourse and labor