During the germinal period, the fertilized ovum duplicates and forms a blastocyst. This hollow ball of cells
a. fills the amnion with fluid
b. develops a tail for movement
c. contains the embryonic disk
d. shrinks in size and is absorbed by the blood
Answer: c. contains the embryonic disk
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Engulfing-phagocytic cells of innate immunity of vertebrates include _____
I) neutrophils II) macrophages III) dendritic cells IV) natural killer cells A) I and III B) II and IV C) I and IV D) I, II, and III E) I, II, III, and IV
Oxytocin is secreted by the posterior pituitary only in females
Indicate whether the statement is true or false.
Which discovery was determined about DNA from x-ray diffraction data?
a. DNA is uniform in length. b. DNA is short and narrow. c. DNA has a repeating pattern. d. DNA molecules are flat. e. DNA molecules are round.
The parietal lobe is responsible for ____
a. vision b. sensory input c. hearing d. generating a motor response e. inhibiting unsuitable behaviors