Most bacteria are:a
photoheterotrophs.
b. chemoheterotrophs.
c. autotrophs.
d. heterotrophs.
e. chemoautotrophs.
D
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During the acute inflammatory response, ________ binds to receptors on the capillary wall to open junctions between the cells that allow fluid and leukocytes to enter the tissue.
Fill in the blank(s) with the appropriate word(s).
The probability of rolling a die twice and getting a 2 and a 6 in no particular order is
a. 1/3 b. 1/4 c. 1/8 d. 1/18 e. 1/36
The p700 photosystem is designated as photosystem
“I” because it a. absorbs light energy first. b. absorbs more energy than photosystem II. c. is the primary photosystem. d. is thought to have evolved first. e. obtains electrons before photosystem II.
In Drosophila melanogaster, polytene chromosomes are produced when
A) a chromosome breaks and rejoins with another section of the same chromosome. B) a cell divides several times before the chromosomes are duplicated. C) chromosomes are duplicated repeatedly without a corresponding nuclear division. D) a segment of a chromosome is duplicated during an unequal crossing-over event. E) characteristic banding patterns form on the chromosomes.