RNA is a long double-stranded helix containing ribose and uracil
Indicate whether this statement is true or false.
FALSE
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Many specialized cells, such as white blood cells, ____
a. remain in G0 until stimulated by external signals to reenter the cell cycle and divide b. remain in S until hormonal signals cause the cell to reenter the cell cycle and divide c. divide continuously and never transition to G0 d. mutate into other cell types by signals from bone marrow cells e. skip anaphase in order to avoid the high likelihood of mutation during this phase of mitosis
The process by which species cease to exist
A. All of the answer choices are correct. B. is endangerment. C. is speciation. D. is extinction. E. has never occurred.
While peering through the microscope, a classmate of yours said, "I know that this thing is supposed to be a ciliate, a flagellate, or an amoeba, but I can't figure out which." You replied, "That's easy, ________."
A. watch how it moves B. all you have to do is see whether it has a nucleus C. watch and see what it eats D. see how big it is
Proteins destined to be secreted by the cell are produced:
A) by the Golgi complex. B) on the rough endoplasmic reticulum. C) in the cytosol. D) by free ribosomes. E) by the smooth endoplasmic reticulum.