Which of the following is a key component of the cytoskeleton?
a. centrosome
b. microtubules
c. DNA
d. ribosomes
e. endoplasmic reticulum
B
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Which of the following is NOT a part of the mitotic spindle apparatus in plants?
A. centrosome B. centrioles C. tubulin proteins D. kinetochore microtubules E. astral microtubules
Red-green color blindness is an X-linked recessive trait in humans. What is the probability that a
color-blind woman and a man with normal vision will have a color-blind daughter? a. 100 percent b. 75 percent c. 50 percent d. 25 percent e. 0 percent
The fact that most segmentation genes code for ____ indicates that these protein products are ____ that regulate the
expression of other genes. a. homeobox genes; genetic switches b. transcription factors; genetic switches c. transcription factors; inducers d. maternal effect genes; protein switches e. hormones; signaling molecules
Energy transformations occur in such a way as to increase the entropy of the universe.
a. true b. false