Why does exchange occur only in capillaries and not in arteries or veins?
What will be an ideal response?
Only capillaries consist of one layer of cells for ready diffusion of materials; arteries and veins have too many layers of cells for diffusion to occur.
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In what way(s) are mycelia and fruiting bodies similar?
A. Both are composed of hyphae. B. Both grow below ground. C. Both produce spores. D. Both are involved in gathering food. E. All the answer options are correct.
Low density lipoproteins
a. carry cholesterol to the liver. b. line the artery walls. c. are used for nutrition. d. lower blood pressure. e. carry cholesterol and other fats to body cells.
The endosperm of an angiosperm seed is typically:a
haploid (1n). b. diploid (2n). c. triploid (3n). d. quadraploid (4n).
e. pentaploid (5n).Some bacteria attach to surfaces of other cells with short outgrowths called ________.
Fill in the blank(s) with the appropriate word(s).