Animal viruses are divided into a number of families whose names end in
A. -virus.
B. -viridae.
C. -viscous.
D. -eieio.
B
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The most severe mass extinction occurred at the end of the Permian Period
Indicate whether the statement is true or false.
Benzer's analysis of phage genomes included deletion mapping
Since recombination could not occur in the area of a deletion, an infection by two phage strains, one of which has a deletion and the other a point mutation, that results in no wild-type recombinants being produced indicates ________. A) that the deletion includes the position of the point mutation in the same gene B) that the deletion includes the position of the point mutation in a different gene C) that the point mutation is dominant D) that the point mutation is recessive E) the distance between the two types of mutation
Four of the statements are true of cladistics. Which statement is false?
A. It involves making hypotheses about the evolutionary relationship between clades. B. It is a precise science. C. It can lead to the creation of a cladogram. D. It may involve parsimony analysis. E. It may use outgroups to “root” the tree.
The placenta protects the developing fetus from harmful substances like alcohol or drugs.
Answer the following statement true (T) or false (F)