A Barr body is a(n)
A. inactive Y chromosome.
B. inactive autosome.
C. active X chromosome.
D. active Y chromosome.
E. inactive X chromosome.
E. inactive X chromosome.
Biology & Microbiology
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Fungi are
a. chemosynthetic. b. chemoautotrophic. c. autotrophic. d. heterotrophic. e. all of these.
Biology & Microbiology
The number of chromatids present in a duplicated chromosome is
a. 1. b. undetermined. c. half that of an unduplicated chromosome. d. 2. e. 4.
Biology & Microbiology
Which statement describes the leaf epidermis?
a. Its cells lack chloroplasts. b. Some of its cells perform photosynthesis. c. Its cell walls are thin. d. Its cells are opaque. e. It has only a single layer.
Biology & Microbiology
Surfactants are detergents that work as microbicidal agents because they increase the surface tension of cell membranes.
a. true b. false
Biology & Microbiology