In a fetal pig, dorsal and ventral refer respectively to
(a) the head and tail regions of the body.
(b) the tail and the head regions of the body.
(c) the upper (back) portion and the lower (underside) portion of the body.
(d) the lower (underside) portion and the upper (back) portion of the body.
(c) the upper (back) portion and the lower (underside) portion of the body.
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Chemical defenses are found in all of the following except
A. marine animals. B. insects. C. plants. D. snakes, spiders, and fishes. E. Batesian mimics.
Which of the following types of light microscopy improves the resolution of thick specimens by illuminating one plane of the specimen at a time?
A) fluorescence microscopy B) phase-contrast microscopy C) confocal microscopy D) differential interference contrast microscopy E) brightfield microscopy
Which of the following do carrier proteins often transport?
a. proteins b. steroid hormones c. H2O d. glucose and amino acids
One-millionth of a meter is called a
A. centimeter. B. decimeter. C. micrometer. D. millimeter. E. nanometer.