Which statement is true about the exchange of gases during respiration?
a. Oxygen diffuses from the cell into the interstitial fluid
b. Carbon dioxide diffuses from the interstitial fluid into the cell.
c. All of these statements are true.
d. Oxygen diffuses from interstitial fluid into the cell.
e. Carbon dioxide diffuses from one cell to another cell.
d
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Endocytosis and exocytosis are mechanisms of ______ transport
Fill in the blank(s) with the appropriate word(s).
Vectors capable of entering two or more different host organisms are known as
A) dual vectors. B) omnivectors. C) shuttle vectors. D) parity vectors. E) universal vectors.
One of the reasons why the model systems of yeast, Arabidopsis, nematode worms, fruit flies, and mice are so often used to study functional analysis of genes is because
A. they all have only a few chromosomes. B. they are easy to cross with each other and observe polyploidy effects. C. they have short life cycles. D. they are easy to observe in the wild. E. they mutate easily leading to new genomic variations.
Archaeal cell walls ________.
A. are disrupted by treatment with lysozyme or penicillin B. are similar to those of Gram-negative bacteria C. are unlike bacterial cells; they all have the same composition D. lack murein and D-amino acids