Which cell organelle helps pinocytosis and phagocytosis to occur?
a. the endoplasmic reticulum
b. the lysosome
c. the plasma membrane
d. the nucleus
Ans: b. the lysosome
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The time it requires for exactly one-half of a given amount of a radioactive isotope of an element to decay is called that isotope's
A. decay time. B. decay product. C. half-life. D. half-decay. E. useful dating range.
At the conclusion of mitosis, each daughter cell has ____
a. twice the amount of DNA and half the cytoplasm of the parent cell b. DNA identical to the parent cell c. half the DNA and half the cytoplasm found in the parent cell d. twice the cytoplasm and the same amount of DNA as the parent cell e. DNA genetically different from the parent cell
Notochords are found in
a. adult hemichordates (acorn worms). b. adult urochordates (tunicates). c. adult cephalochordates (lancelets). d. a and b only. e. b and c only.
Which three stages or transitions in the cell cycle seem to serve as points of control (checkpoints)?
What will be an ideal response?