Which one of the following statements about gills operating in water is FALSE?
A. Water can support delicate gill structures.
B. Most fish actively pump water over their gills.
C. Keeping membranes moist is not a problem.
D. Water carries more oxygen than air and this requires gills be more efficient than lungs.
E. Gills have evolved many times and take different forms in aquatic animals.
D. Water carries more oxygen than air and this requires gills be more efficient than lungs.
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If you were to dissect a root, the layers from outside to inside would be:
A. epidermis cortex endodermis phloem xylem. B. cortex epidermis phloem endodermis xylem. C. epidermis cortex endodermis xylem phloem. D. endodermis cortex epidermis phloem xylem. E. epidermis endodermis cortex phloem xylem.
A red-eyed female fruit fly is crossed with a red-eyed male fruit fly. All of the female offspring have red eyes but only one-half of the male offspring are red-eyed. The other half of the male offspring have white eyes. In this example, eye color in fruit flies
A. is influenced by the environment. B. is an X-linked trait. C. is controlled by several genes. D. exhibits lack of dominance.
Prokaryotes ____.
A. have a nucleus B. have complex, usually membrane-bound organelles C. always have cell walls D. are either bacteria or archaea E. always have flagella
8. _____ refers to all of the chemical reactions that occur within the cells of living things
Metabolism Cellular respiration Homeostasis Reproduction