Under normal cellular conditions, what is the diameter of the chromatin as it forms the solenoid structure?
A) 3 nm
B) 10 nm
C) 30 nm
D) 34 nm
E) 100 nm
C
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Thick-skinned rhinoceroses and elephants were once classified together as pachyderms. They actually descended from different ancestors that in turn evolved from a thin-skinned common ancestor that was not included in the pachyderms. Pachyderms were therefore, as a taxon,
A. polyphyletic. B. polygenetic. C. paraphyletic. D. a supergroup. E. a kingdom.
In the central nervous systems, axons of several neurons traveling together are called ____
a. nuclei b. fibers c. bundles d. tracts e. filaments
Little parental care is required by ________ offspring, which are able to move about and forage for themselves shortly after birth
Fill in the blank(s) with correct word
Imagine that you are studying a very large population of moths that is isolated from gene flow. A single gene controls wing color. Half of the moths have white-spotted wings (genotype WW or Ww), and half of the moths have plain brown wings (ww). There
are no new mutations, individuals mate randomly, and there is no natural selection on wing color. How will p, the frequency of the dominant allele, change over time? A) p will increase; the dominant allele will eventually take over and become most common in the population. B) p will neither increase nor decrease; it will remain more or less constant under the conditions described. C) p will decrease because of genetic drift. D) p will fluctuate rapidly and randomly because of genetic drift.