Stabilizing selection tends to _____ (select all that apply)
a. eliminate extreme forms of a trait
b. favor extreme forms of a trait
c. eliminate intermediate forms of a trait
d. favor intermediate forms of a trait
A, D
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If you touch a hot stove with your hand, the sensory receptors in your hand send a signal of pain to the CNS through the _____________ nerve fibers of the peripheral nervous system.
Fill in the blank(s) with the appropriate word(s).
The first bioengineered organisms were ____
a. Viruses b. Fungi c. Protozoans d. plant cells e. Bacteria
What is the name of the mesoderm-derived, calcium-stiffened structures that comprise the internal skeleton of echinoderms?
a. ampullae b. ossicles c. madreporites d. radial canals
Why does trimming the top of a plant make the plant bushier?
A. Trimming forces leaves around the vicinity of the cuts to become reproductive leaves. B. Trimming damages or removes the apical meristem, which activates the axillary meristems to grow. C. Trimming stimulates the cork cambium to produce more secondary growth. D. Trimming disrupts vertical transport routes for water and nutrients while enhancing horizontal transport routes. E. Trimming stimulates the plant to produce more rhizomes, which results in more branches.