Which of the following is true of both neurotransmitters and hormones?
A. They are both involved in paracrine signaling.
B. They both interact with receptors inside or on the surface of target cells.
C. They are both produced in glands.
D. They both travel through the bloodstream to target cells.
E. They both influence the activity of multiple organs simultaneously.
B. They both interact with receptors inside or on the surface of target cells.
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What type of reproduction produces genetic clones of a parent?
a. sexual reproduction b. asexual reproduction c. hermaphrodites d. external fertilization e. internal fertilization
Geneticists can create sequences of DNA from RNA using enzymes called ________.
A. palindromes B. reverse transcriptases C. restriction endonucleases D. ligases E. DNA polymerases
The variable in the butterfly experiment is
a. butterfly wing pattern color. b. butterfly species. c. bird predator species. d. rainforest region used. e. percentage of survivors.
A brain injury to which structure might often be fatal?
a. thalamus b. hypothalamus c. cerebrum d. brain stem e. cerebellum