A dikaryotic cell
a. is a spore.
b. results from nuclear fusion.
c. contains nuclei of two different mating
types.
d. becomes a zygote.
e. becomes a gamete
C
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Place the following events of mitosis in the correct order.
I. Sister chromatids align on the metaphase plate. II. The cleavage furrow forms. III. The nuclear membrane breaks up. IV. Sister chromatids condense. V. Sister chromatids separate. A. I, II, III, IV, V B. III, IV, I, V, II C. IV, III, I, V, II D. III, II, I, IV, V E. IV, I, III, V, II
Which of the following is not a required characteristic of antigens from microbial pathogens that might be used in vaccine production?
A. It must be essential for the survival of the pathogen in the host. B. It must be excreted or found on the surface of the pathogen. C. It must be found in all strains of the pathogen. D. All of the choices are correct.
Select the TRUE statement.
a. During ventricular diastole, arterial pressure drops to zero. b. During ventricular systole, the semilunar valves remain closed. c. During atrial systole, the atrioventricular valves are closed. d. The P wave occurs during ventricular diastole.
The lophophore of a brachiopod serves the same function as the ________ in a bivalve.
A. Shell B. Foot C. Mantle D. Gills