Animal viruses are divided into a number of families whose names end in

A. -virus.
B. -viridae.
C. -viscous.
D. -eieio.


B

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology

The placenta protects the developing fetus from harmful substances like alcohol or drugs.

Answer the following statement true (T) or false (F)

Biology & Microbiology