The structure at letter "C" is the
a. esophagus.
b. gullet.
c. epiglottis.
d. pharynx.
e. trachea.
e
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Soil mineral particles that range from 0.02-0.002 mm in diameter are called ____
a. fine sand b. humus c. clay d. silt e. coarse sand
If a single nondisjunction occurs during
anaphase II of meiosis in a normal male cell from meiosis I, of the resulting sperm,
a. three would be normal and one would have an extra chromosome. b. two would be normal, one would have an extra chromosome, and one would be missing a chromosome. c. two would have an extra chromosome and two would be missing a chromosome. d. all four sperm would have an extra chromosome. e. three would have an extra chromosome and one would be normal
Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. What does this experiment show?
A. Cells continue to grow as long as there is adequate space. B. The controls on cell growth and division can be turned on and off. C. When cells come into contact with other cells, they stop growing. D. Cell division can be regulated by factors outside of the cell. E. All of the answer choices are correct.
The meiofauna of a sandy beach are organisms living on the surface of sediments
Indicate whether the statement is true or false