Complex tissues are tissues consisting of ____
a. two or more cell types
b. only one cell type
c. only parenchyma cells
d. only collenchyma cells
e. only sclerenchyma cells
ANSWER: a
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Typically, one one sperm fertilizes the oocyte
because
a. an acid solution is released that kills all other sperm. b. special organelles within the oocyte eject more than one sperm. c. changes occur to the protein coat that prevent further penetration. d. follicle cellular space is only wide enough for one sperm. e. usually only one sperm arrives at the oocyte.
Proximity of capillaries to tissue cells is crucial
because a. bulk flow operates to move protein-free plasma through clefts between endothelial cells. b. red cells have to squeeze single file through capillaries. c. some proteins exit capillaries by endocytosis and exocytosis. d. diffusion is a slow process. e. all of these are true.
Archaeal membranes contain which of the following lipids?
A. Glycolipids B. Sulfolipids C. Phospholipids D. All of the choices are correct.
Tropical ________ refers to vegetation in the drier tropics and subtropics that is dominated by a ground cover of grasses with scattered shrubs or trees
Fill in the blank(s) with correct word