The most recent techniques developed in the biological sciences allow the manipulation of DNA with the ultimate goal of intervening directly with the ________ fate of organisms.

A. genetic
B. developmental
C. mitotic
D. adult


Answer: A

Biology & Microbiology

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Plant and animal development share a number of features, but differ in major ways. Which of the following is a key difference between plants and animals?

A) Animals typically produce gametes by meiosis; plants produce gametes by mitosis. B) Animal cells frequently undergo programmed cell death; plant cells do not. C) Animal development is controlled by regulatory gene sets such as Hox genes; plants have no similar control systems. D) Animal gametes are produced only after maturity is reached; plant gametes are produced throughout a plant's lifetime.

Biology & Microbiology

What compound diffuses through open stomata into plant tissues thereby initiating photosynthesis?

a. water molecules b. oxygen gas c. carbon dioxide d. potassium ions e. calcium ions

Biology & Microbiology

Contraction of the fibers labeled A in the accompanying figure results in:


a. elongation of the body.
b. elongation of the tentacles.
c. elongation of the gastrovascular cavity.
d. shortening of the body.
e. expansion of the pedal disk.

Biology & Microbiology

Which of the following organisms has a dominant sporophyte generation and a free-living gametophyte generation?

A) moss B) fern C) mushroom D) conifer

Biology & Microbiology