What powers ATP synthase directly?
a. electron transfer
b. NADH and FADH2
c. carbohydrate metabolism
d. proton gradient
e. protein complexes
D
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Placoid scales are characteristic of class
(a) Cephalaspidomorphi. (b) Chondrichthyes. (c) Osteichthyes. (d) Reptilia.
In Drosophila, the genes y (yellow body) and car (carnation eyes) are located at opposite ends of the X chromosome. In doubly heterozygous females (y+car+ / ycar), a single chiasma is observed somewhere along the X chromosome in 90% of the examined oocytes. No X chromosomes with multiple chiasmata are observed. What percentage of the male progeny from such a female would be recombinant for y and car?
A) 5% B) 10% C) 45% D) 55% E) 90%
Radially symmetrical animals have a nerve __________. Fill in the blank(s) with the appropriate word(s)
Bacteria reproductive strategies include all of the following EXCEPT ________.
A. budding B. binary fission C. formation of multinucleoid filaments that break apart into uninucleate spores D. multiple fission E. fusion of two bacterial cells that then split into four uninucleate cells