Molecular clocks are based on _____ mutations
A. advantageous
B. lethal
C. deleterious
D. neutral
D
Biology & Microbiology
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In animals, meiosis results directly in gamete production, while in plants spores are produced. How are the gametes produced in the life cycle of a plant?
What will be an ideal response?
Biology & Microbiology
The tough, two-layered sac of connective tissue that holds the heart is called the ________
a. ventricle b. atrium c. myocardium d. pericardium
Biology & Microbiology
Which of the following are the respiratory openings in insects?
a. spiracles b. trachea c. chitins d. cephalothorax
Biology & Microbiology
Cells that have the FasL molecule
a. must also possess the Fas protein. b. must be cytotoxic T cells. c. must be melanocytes. d. will attack each other. e. will attack cells that have the Fas protein.
Biology & Microbiology