The first cell seen by Robert Hooke using a microscope was a
a. skin cell.
b. cork cell.
c. blood cell.
d. root tip cell.
e. sperm cell.
Ans: b. cork cell.
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A mutation in the Hoxc8gene in the ancestor of modern snakes caused its descendants to have ____
a. no forelimbs or necks b. vestigial forelimbs c. necks but not forelimbs d. no ribcages or limbs e. no forelimbs or hindlimbs
biology, many complementary processes exist. Explain how condensation reactions are
complementary to hydrolysis reactions. What will be an ideal response?
During protein synthesis, ________ occurs in the nucleus as a copy of DNA is made into mRNA, and ________ begins in the cytoplasm, when mRNA associates with a ribosome.
What will be an ideal response?
If a virus enters the lytic phase in a host's cell, it will cause the host cell to
A. reject the virus. B. initiate an attack on the virus. C. lyse due to the action of enzymes. D. replicate itself at a higher than normal frequency. E. shrink because of the loss of cytoplasm that has been used in the synthesis of viral DNA.