Which of the following statements is true regarding the involvement of sexual selection on male function (pollen donation) leading to sexual dimorphism in flowers?
A) Female flowers typically receive far more pollen than is needed to fertilize their seeds.
B) Delph and colleagues (1996 ) found that out of 42 animal-pollinated plant species, 29% of females had the largest reproductive parts, but males had the largest perianths.
C) Studying wild radishes, Stanton and colleagues (1996 ) found that reproductive success through pollen donation was limited by pollinator visits, whereas reproductive success through seed production was not.
D) All of the above statements are true.
D
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Negative mycobacterial cultures are reported final and the cultures are discarded after what period?
a. 7 days b. 2 weeks c. 4 weeks d. 8 weeks
If a person were experiencing lack of understanding of emotional situations or seemed unable to recognize displays of emotion by other individuals, the likely area of brain trauma would be the
A. amygdala. B. hippocampus. C. thalamus. D. pons. E. reticular formation.
DNA is cut by ____
a. nucleases b. proteases c. stem cells d. Ti plasmids e. restriction fragment length polymorphisms
Prions
a. are more complex than viruses b. have large DNA genomes c. cause neurodegenerative disorders in mammals d. infect plant cells e. encode their own polymerases for nucleic acid replication