Sickle cell disease and cystic fibrosis are relatively common because people who
ID: 16648 • Letter: S
Question
Sickle cell disease and cystic fibrosis are relatively common because people who are___________ have had a survival advantage.
a. homozygous recessive
b. heterozygous
c. homozygous dominant
Matching. Choose the letter of the best match for each item.
Evolution a. Result from convergent evolution
Natural Selection b. Result from recent shared ancestry
Sexual Selection c. Change in allele frequencies of a
Analogous structures population
(wings butterflies and wings of bats) d. Some phenotypes are better able
Homologous structures to survive and reproduce
(forelimbs of humans, cats, whales, and bats) e. Some phenotypes are better able
reproduce.
Sporophytes produce __________________ which are ____________________.
a. eggs and sperm; haploid
b. eggs and sperm; diploid
c. spores; haploid
d. spores; diploid
Gametophytes produce _________________ by the process of ________________.
a. eggs and sperm; mitosis
b. eggs and sperm; meiosis
c. spores; mitosis
d. spores; meiosis
Mosses and liverworts (the bryophytes) do
a. produce embryos.
b. have vascular tissue.
c. produce flowers.
d. produce seeds.
e. all of the above.
Ferns, gymnosperms, and angiosperms all
a. produce flowers.
b. produce seeds.
c. produce cones
d. have vascular tissue.
e. have all of the traits listed above.
Explanation / Answer
Sickle cell disease and cystic fibrosis are relatively common because people who are
___________ have had a survival advantage.
b. heterozygous
Matching.
question is not clear
Choose the letter of the best match for each item.
Evolution
a. Result from convergent evolution
Natural Selection
b. Result from recent shared ancestry-----------Result from convergent evolution
Sexual Selection
c. Change in allele frequencies of a
Analogous structures population----------a. Result from convergent evolution
(wings butterflies and wings of bats)
d. Some phenotypes are better able
Homologous structures to survive and reproduce
(forelimbs of humans, cats, whales, and bats)
e. Some phenotypes are better able==========Sexual Selection
reproduce.
Sporophytes produce __________________ which are ____________________.
c. spores; haploid
Gametophytes produce _________________ by the process of ________________.
a. eggs and sperm; mitosis
Mosses and liverworts (the bryophytes) do
a. produce embryos.
Ferns, gymnosperms, and angiosperms all
a. produce flowers.
b. produce seeds.
c. produce cones
d. have vascular tissue.
e. have all of the traits listed above.
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