How do bony fish regulate buoyancy?
A) With an air-filled swim bladder
B) With a large, oil-filled liver
C) By constantly swimming at an upwards angle
D) Through the calcium in the bones, which makes the skeleton lighter than the water
A
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Lederberg and Tatum's experiments demonstrated that
A. bacteria can acquire genetic material from each other. B. bacteria do not release DNA into the environment for other bacteria to take up. C. bacteria must be in physical contact in order for bacteria to exchange genetic material. D. the genetic transfer occurred when the bio+, met+ phe-thr- strain transferred DNA to the bio-met- strain. E. All of these observations were made by Lederberg and Tatum.
Oysters dominate this rocky shore zone
a. The middle and low midlittoral b. The subtidal zone c. The supralittoral fringe d. The upper midlittoral e. The splash zone.
Which of the following describes the sepal of a flower?
a. a modified leaf that encloses the bud b. a long thin structure that links the stigma to the ovary c. a thin stalk that links the anther to the flower’s base d. a sac-like structure at the tip of the stamen
Answer the following questions true (T) or false (F)
1. Ejaculation initially deposits the sperm in the uterus. 2. Ovulation refers to growth of the primary follicle. 3. An egg is not a gamete.