Sickle cell disease and cystic fibrosis are relatively common because people who

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

Natural Selection

Sexual Selection

Analogous structures (wings butterflies and wings of bats)

Homologous structures (forelimbs of humans, cats,whales, and bats)

choices to match from:

a. Result from convergent evolution

b. Result from recent shared ancestry

c. Change in allele frequencies of a population

d. Some phenotypes are better able to survive and reproduce

e. Some phenotypes are better able to 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.
a. homozygous recessive
b. heterozygous
c. homozygous dominant


Matching. Choose the letter of the best match for each item.

Evolution

Natural Selection

Sexual Selection

Analogous structures (wings butterflies and wings of bats)

Homologous structures (forelimbs of humans, cats,whales, and bats)

a. Result from convergent evolution - Analogous structures

b. Result from recent shared ancestry - Homologous Structures

c. Change in allele frequencies of a population - Evolution

d. Some phenotypes are better able to survive and reproduce - Natural Selection

e. Some phenotypes are better able to reproduce - Sexual Selection

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.

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