Molecules on the outside of the egg or sperm may trigger events that prevent their union if they are not from the same species. The type of isolating mechanisms displayed here is
A. morphological.
B. biochemical.
C. habitat.
D. polyploidy.
B. biochemical.
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A molecule of RNA has 99 phosphodiester bonds connecting ________ ribonucleotides.
Fill in the blank(s) with the appropriate word(s).
Actinoplanetes have extensive ________ mycelia.
Fill in the blank(s) with the appropriate word(s).
A plasmid vector and chromosomal DNA are treated separately with the same restriction enzyme. Which of the following might occur if the digested plasmid and chromosomal DNA were incubated together?
A. The two sticky ends of the plasmid could hybridize back together, recircularizing. B. The two sticky ends of the plasmid could hybridize to both sticky ends of the chromosomal DNA fragments. C. The two sticky ends of the plasmid could hybridize back together and recircularize as well as hybridize to both ends of a fragment of chromosomal DNA. D. The two sticky ends of the plasmid could hybridize with two ends of another type of plasmid. E. The two sticky ends of the vector would remain free or unhybridized.
Why do veins have less elastic components than arteries?
What will be an ideal response?