Scuba divers use a BCD to control buoyancy. It is essentially a bag that can be inflated or deflated to prevent excessive sinking or floating. How do bony fish accomplish this?
A. They adjust their position using the pectoral and pelvic fins.
B. They adjust the level of gasses in their swim bladder.
C. They pump their operculum.
D. They swim rapidly to saturate the blood with oxygen.
Answer: B
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The phenotypic differences between chimps and humans is best explained by _____
a. the high variation in the number of different genes between the two species b. the high number of inversion sequences c. epistatic changes to genes d. patterns of gene expression and regulation e. the large amount of "junk DNA" found in chimpanzee genomes
Flowers that bloom in early spring versus those that bloom in late summer experience which type of reproductive
isolation?
a. behavioral b. ecological c. gametic d. temporal e. mechanical
A transport system in which transport of an ion in one direction provides the energy for active
transport in the opposite direction is known as ____.
a. antiport b. active diffusion c. symport d. cotransport e. osmosis
Which of the following is an overgrowth of cells that serves no useful purpose?
A. oncogene B. tumor C. growth D. proto-oncogene E. callus