Which of the following are maternal effect genes that control the orientation of the egg and thus the Drosophila embryo?
A) homeotic genes
B) segmentation genes
C) egg-polarity genes
D) morphogens
E) inducers
Answer: C
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The biceps brachii is responsible for flexing the forearm while the triceps brachii extends the forearm. Muscles with such opposite actions are called
(a) cooperative. (b) antagonistic. (c) involuntary. (d) sensory.
Movement of a substance from an area of low concentration to an area of high concentration using
energy obtained from ATP is called ____.
a. passive transport b. diffusion c. facilitated transport d. osmosis e. active transport
Darkness increases secretion of __________ by the pineal gland in the brain. Fill in the blank(s) with the appropriate word(s)
An individual that arises by reproductive cloning has a nuclear genome that is identical to __________
(a) the female who donated the egg. (b) the adult who donated the cell for nuclear transplantation. (c) both the female who donated the egg and the adult who donated the cell for nuclear transplantation. (d) the foster mother in which the embryo is placed.