The process occurring at arrow 3 in the accompanying figure is:
a. fertilization.
b. G1.
c. meiosis.
d. mitosis.
e. fusion.
c
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Which molecules are essential components of tight junctions?
A. cadherins and connexins B. cadherins and integrins C. claudins and integrins D. cadherins and claudins E. connexins and claudins
Which variable will influence radioactive decay?
a. Moisture b. Temperature c. Time d. Pressure e. Chemical bonding state
Which of the following summarizes the Hardy-Weinberg principle?
a. Without evolutionary forces, a population’s allele frequencies are stable. b. Traits are acquired through use or disuse and passed to offspring. c. Due to microevolution, the population’s genetic structure is changing. d. Natural selection impacts the genetic makeup of a population.
Features that contributed to success on land include a
__________ that protects spores. Fill in the blank(s) with the appropriate word(s).