Why is satellite DNA able to be isolated from other DNA in a density gradient? What is cryptic satellite DNA?
What will be an ideal response?
Ans: In the density gradient, DNA is isolated based on differences in G-C content, so satellite DNA has a different G-C content than most DNA. Cryptic satellites have a similar G-C content to that of nonrepetitive DNA, but have the features of satellite DNA (i.e., long arrays of tandem repeats).
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Match the molluscan body part to its function.
1. mantle cavity 2. visceral mass 3. mantle 4. foot a. movement b. houses organs c. secretes the shell d. houses gills
__________ are electrically excitable cells that signal other cells by means of chemical messages. Fill in the blank(s) with the appropriate word(s)
what is the etiology of botulism?
What will be an ideal response?
If two or more phenotypes in a population are both favored by selection, what is happening?
A) Stabilizing selection B) Sexual selection C) Gene flow D) Directional selection E) Balanced polymorphism