In __________, a pair of nonidentical alleles
affecting two phenotypes for a given trait is both
expressed at the same time in heterozygotes.
a. pleiotropy
b. polygenic inheritance
c. complete dominance
d. codominance
e. a multiple allele system
Answer: d
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Vessel elements must be thinner and shorter than tracheids because they lack the structural integrity to support large angiosperm trees
A. true B. false
One of the most common repetitive motion injuries is
a. a sprained ankle. b. a dislocated shoulder. c. carpal tunnel syndrome. d. rheumatoid arthritis. e. a torn ligament.
Humans share several features with salamanders. Certain genes and proteins are nearly identical between the two species; both species have four limbs with a similar skeletal structure; the species' early embryos are very similar; and where the salamander has a functional tail, humans have a vestigial tailbone. In evolutionary terms, these are examples of
A) biogeographic similarity. B) homology. C) independently acquired traits. D) adaptation by natural selection. E) coincidental similarity.
Eukaryotes that are not plants, animals, or fungi are classified as ________
Fill in the blank(s) with correct word