Groups of related, but distinctly different genes that appear to have arisen from a single ancestral gene are referred to as  

A.  segmental duplications.
B.  pseudogenes.
C.  tandem clusters.
D.  multigene families.
E.  expressed sequences.


D.  multigene families.

Biology & Microbiology

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Club mossesspike mosses, and quillworts are members of the ____ phylum

a. Hepatophyta b. Monilophyta c. Bryophyta d. Lycophyta e. Anthocerophyta

Biology & Microbiology

In which cell type would a cell plate form after telophase is complete?

A. bacteria B. animal C. protist D. plant

Biology & Microbiology

Animals have enzymes that break apart starch molecules but not cellulose, despite the fact that both are made up of glucose subunits. Which enzyme characteristic best explains this?

A) Enzymes are not permanently changed by the reactions they promote. B) All enzymes are proteins. C) Enzymes are highly specific. D) Enzyme activity is regulated. E) Enzymes usually speed up chemical reactions.

Biology & Microbiology

Explain how the centromere-drive hypothesis accounts for rapid evolution at the centromeres

What will be an ideal response?

Biology & Microbiology