Which of the following is characteristic of cones?
a. night vision
b. dim light
c. perception of color
d. coarse perception of movements
e. found in optic disc
ANSWER: c
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When antibodies bind antigens, the clumping of antigens results from _____
A) the antibody having at least two binding regions B) disulfide bridges between the antigens C) a complement that makes the affected cells sticky D) bonds between class I and class II MHC molecules E) denaturation of the antibodies
What is the difference between a nucleoside and a nucleotide?
a. A nucleoside is only found in RNA, but nucleotides are found in both. b. A nucleoside forms through hydrogen bonding, but nucleotides form through covalent bonding. c. A nucleoside is a nucleotide without the phosphate group(s). d. A nucleoside results from mutation and nucleotides are non-mutated forms.
Which of the following is false about rocky shores?
a. Mangroves are common. b. Silt is removed by waves. c. They retain finer sediments. d. Surf functions to oxygenate the water. e. Sessile organisms are common.
An organelle found in plant cells and some members of the kingdom Protista but not in animal cells is a
A. chloroplast. B. lysosome. C. Golgi apparatus. D. rough endoplasmic reticulum. E. mitochondrion.