How many copies of each gene are present in these skin cells at G2 of interphase?
A. 2
B. 4
C. 6
D. 8
B
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DNA replication is started with a(n) ________, which, in most cases, in vivo is a short stretch of ________
A) promoter / DNA B) mRNA / RNA C) primer / RNA D) ribosome-binding sequence / DNA
Where is the visual image in focus for a nearsighted individual?
A. behind the retina B. in front of the retina C. on the retina, but it appears blurred D. at the lens, forming a shadow on the retina E. on the retina, but it is upside down
Which of the following is NOT true of
placozoans?
a. They have a flattened body. b. They have ciliated cells and gland cells. c. They eat bacteria and single-celled algae. d. They have four types of cells. e. None of these are true of placozoans
Responses to heat stress include
a. reduction in muscle contraction. b. increased sweating. c. dilation of peripheral blood vessels. d. loss of salts and liquids. e. all of these.