The current concept of a climax community states that forest communities:a
never reach a state of permanent equilibrium.
b. never are disturbed.
c. are determined solely by climate.
d. are not permanently affected by fires or floods.
e. are the inevitable end-point of succession.
A
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Chromatin remodeling can act as an on/off switch for ________, while microRNA binding can block ________.
A) transcription; translation B) translation; transcription C) synthesis of tRNAs; synthesis of rRNAs D) DNA replication; DNA repair
Which is a mechanism by which transposable element mobilization may be controlled by the cell? (Select all that apply.)
A) blocking transcription of transposable element genes B) blocking translation of transposable element transcripts C) alternative splicing of transposable element transcripts D) synthesizing an enzyme that removes transposable elements from the genome E) increasing the mutation rate of transposable element DNA sequences
The endosymbiont hypothesis is supported by
the work of ____ on bacteria-infected Amoeba proteus. a. Stanley Miller b. Kwang Jeon c. Thomas Brock d. Lynn Margulis e. Australian researchers
The ________ molecule hides the myosin-binding site on the actin when muscles are not contracting.
A. tropomyosin B. ATP C. neurotransmitter D. calcium