Hermaphroditic earthworms reproduce sexually by connecting their bodies by their ____. This allows transfer of ____
from one worm to the other.
a. setae; zygotes
b. setae; eggs
c. setae; sperm
d. clitellum; eggs
e. clitellum; sperm
ANSWER: e
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The process by which soil bacteria convert NH3 or NH4 to nitrate (NO3-) is called
A. assimilation. B. denitrification. C. Decomposition. D. nitrification. E. ammonification.
From the cardiac pacemaker, the excitatory
signal travels to the
a. sinoatrial node. b. atrioventricular node. c. septum. d. base of the ventricles. e. aortic valve.
What type of immunity can be transferred by bodily fluids from one person to another, thus conferring immunity to the recipient?
What will be an ideal response?
Amplification of DNA is accomplished by
A. DNA sequencing. B. gene probes. C. Southern blot. D. polymerase chain reaction. E. All of these choices are correct.