You catalog all obligate asexual species within a family of insects and notice that asexual species are rare and are all members of genera that consist mainly of sexual species. Why do you conclude that asexual species tend to be short lived?
What will be an ideal response?
ANS:
Short-lived taxa are less likely to give rise to an entire clade of descendent species.
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Each ________ fragment of an antibody molecule contains the variable regions of a heavy and light chain that folds into a groove for one epitope.
A. terminal B. variable C. Fc D. FAb E. hinge
The "small" in the small intestine refers to its length
Indicate whether the statement is true or false.
How many unique STR regions does the FBI use in forensic analysis?
A) 1 B) 5 C) 13 D) 50 E) 100+
Which of the following is generally true of aneuploidies in newborns?
A) A monosomy is more frequent than a trisomy. B) Monosomy X is the only viable monosomy known to occur in humans. C) Human aneuploidy usually conveys an adaptive advantage in humans. D) An aneuploidy resulting in the deletion of a chromosome segment is less serious than a duplication.