Which of the following could result in the most serious type of mutation?
A. A nucleotide substitution in an exon.
B. A nucleotide deletion in an exon.
C. A nucleotide insertion in an intron.
D. A nucleotide substitution in an intron.
E. More than one of these would be most serious.
B
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Long filaments containing microtubules and used for cellular locomotion are called ________, whereas short fibers containing microtubules and used for cellular locomotion are called ________.
Fill in the blank(s) with the appropriate word(s).
The pyloric sphincter, the circular muscle that controls the entrance of food from the stomach to the
small intestine, usually opens only slightly. What is the purpose of this?
What will be an ideal response?Which general term is used to group various biological and behavioral properties of organisms that act to prevent or reduce interbreeding?
A) phyletic evolution B) inbreeding C) reproductive isolating mechanisms D) genetic divergence E) allopatric speciation
Which vitamin can be synthesized by the body?
What will be an ideal response?