In addition to fertilizing the egg, sperm also ____
a. assist the fertilizing sperm in penetrating the egg
b. trigger chemical changes in the egg
c. dissolve the outer barriers surrounding the oocyte
d. release chemicals to speed cell division in the zygote
e. trigger chemical changes in the egg that prevent the entry of more than one sperm
e
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Capillary action is one of the forces that aids water's upward movement in plants. The narrower the diameter of the tube, the farther the water column will rise. Capillary action is a result of water molecules:
A. producing sufficient surface tension to overcome the pull of gravity. B. having a strong cohesive force and attaching to the surrounding vessel walls. C. storing heat and thus moving faster because of heat of vaporization. D. having an adhesive force, which allows them to attach to the vessel walls. E. being associated with hydrophobic molecules, which can result in upward movement.
Which of the following chemical substances contributes to the unique characteristics of acid-fast bacteria?
A) N-acetylglucosamine B) peptidoglycan C) lipoteichoic acid D) endotoxin E) mycolic acid
Clinical significance of plasmids
What will be an ideal response?
Explain the steps of binary fission
What will be an ideal response?