Members of two different species are never capable of mating.
a. true
b. false
Answer: b. false
You might also like to view...
Defects in cell signaling can lead to a cancerous cell due to:
A. overproduction of signals that trigger cell division. B. overproduction of a receptor that triggers cell division. C. a defective receptor that stays in the activated state and triggers cell division continuously. D. a defective signal-transduction protein that stays in the activated state and triggers cell division continuously. E. All of these choices are correct.
Which of the following is not a class of plant secondary compounds?
A) terpenoids B) phenolics C) nitrogen-based compounds D) alkanes
Which neurotransmitter opens ligand-gated sodium channels?
a. GABA b. cortisol c. ecdysone d. acetylcholine e. brassinosteroid
In a muscle contraction, which element is fixed
in place?
a. the muscle fiber b. the myofilament c. the sarcomere d. the actin filament e. the myosin filament