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Exam 4 pt.1

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LEC. 17-19 Questions
Eboni Barnes
Quiz por Eboni Barnes, atualizado more than 1 year ago
Eboni Barnes
Criado por Eboni Barnes mais de 7 anos atrás
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Resumo de Recurso

Questão 1

Questão
Lichens are made up of two different kinds of organisms living in a symbiotic relationship. The two organisms are
Responda
  • an alga or cyanobacterium and a fungus
  • a protozoon and a fungus
  • a fungus and the roots of a plant
  • a plant and an animal
  • a bacterium and a protozoon

Questão 2

Questão
In the basidiomycete life cycle, the only diploid cell is the
Responda
  • zygote
  • zygospore
  • conidium
  • primary mycelium
  • secondary mycelium

Questão 3

Questão
The only fungi that have flagellated cells are the
Responda
  • ascomycetes
  • basidiomycetes
  • zygomycetes
  • chytrids
  • glomeromycetes

Questão 4

Questão
Rhizopus nigricans is a member of the phylum
Responda
  • Zygomycota
  • Chytridiomycota
  • Ascomycota
  • Glomeromycota
  • Basidiomycota

Questão 5

Questão
Large reproductive structures produced by some fungi are called
Responda
  • mycelia
  • mycorrhizae
  • hyphae
  • fruiting bodies
  • conidia

Questão 6

Questão
Mycorrhizae are a
Responda
  • symbiotic association between a termite and a fungus
  • symbiotic association between an alga and a fungus
  • symbiotic association between a fungus and a plant root
  • parasitic association between a bacterium and a plant root
  • parasitic association between a bacterium and a lichen

Questão 7

Questão
When a lichen has a flat appearance and grows tightly attached to a rock the lichen is described as being
Responda
  • foliose
  • crustose
  • globose
  • laminose
  • fruticose

Questão 8

Questão
Mushrooms belong to the phylum
Responda
  • Ascomyceta
  • Basidiomycota
  • Zygomycota
  • Glomeromycota
  • Chytridiomycota

Questão 9

Questão
In a mycorrhizal association, the plant provides ____ to the ____.
Responda
  • phosphorous; lichen
  • sugars; fungus
  • amino acids; alga
  • nitrogen; bacterium
  • water; alga

Questão 10

Questão
Most fungi produce filaments called
Responda
  • hyphae
  • mycorrhizae
  • conidia
  • sporangia
  • none of these

Questão 11

Questão
Hyphae that contain two genetically distinct nuclei within each cell are referred to as
Responda
  • haploid
  • diploid
  • dikaryotic
  • polyploid
  • none of these

Questão 12

Questão
In the ascomycetes, meiosis occurs inside a(n)
Responda
  • conidium
  • sporangium
  • ascus
  • arbuscule
  • basidium

Questão 13

Questão
Conidia are
Responda
  • asexual spores
  • sporangia
  • hyphae
  • arbuscules
  • basidia

Questão 14

Questão
The sac fungi belong to the phylum
Responda
  • Zygomycota
  • Chytridiomycota
  • Ascomycota
  • Glomeromycota
  • Basidiomycota

Questão 15

Questão
Mendel's principle of dominance implies that
Responda
  • alleles cannot be expressed unless they are both the same.
  • alleles are the carriers of genetic information.
  • both alleles are expressed equally.
  • only one allele is expressed in the heterozygous condition.
  • none of these

Questão 16

Questão
A true breeding tall pea plant is crossed with a true breeding dwarf pea plant. All of the F1 offspring are tall. What is the genotype of the dwarf parent plant?
Responda
  • TT
  • Tt
  • tt
  • TTt
  • tT

Questão 17

Questão
A parent heterozygous for two traits will produce ____ types of gametes with respect to those traits.
Responda
  • 2
  • 3
  • 4
  • 6
  • 8

Questão 18

Questão
If 76 out of 104 offspring express the dominant trait in a particular cross, the parents were most likely to be
Responda
  • both homozygous dominant.
  • both homozygous recessive.
  • both heterozygous.
  • one homozygous dominant and the other homozygous recessive.
  • one homozygous recessive and the other heterozygous.

Questão 19

Questão
Recessive traits
Responda
  • are expressed only if the organism is heterozygous.
  • are expressed only if the organism is homozygous recessive.
  • are never expressed.
  • never skip a generation.
  • will always be expressed.

Questão 20

Questão
In garden peas, tall (T) is dominant to dwarf (t). What phenotype ratio of offspring would you expect from crossing a tall (Tt) plant with a dwarf (tt) plant?
Responda
  • 1:1:1:1
  • 9:3:3:1
  • 3:1
  • 9:7
  • 1:1

Questão 21

Questão
A tall pea plant (TT) and a different tall pea plant (Tt) have the same
Responda
  • alleles.
  • genetic makeup.
  • genotype.
  • offspring.
  • phenotype.

Questão 22

Questão
A dihybrid cross
Responda
  • involves diploid individuals.
  • involves individuals differing in one trait.
  • involves individuals differing in two traits.
  • involves individuals with polygenes.
  • requires two test crosses.

Questão 23

Questão
In garden peas, inflated pods (I) is dominant to pinched pods (i). What are the chances of getting pods that are inflated from crossing a homozygous dominant plant with a heterozygous plant? You must show your Punnett square to get full credit.
Responda
  • 0%
  • 25%
  • 50%
  • 75%
  • 100%

Questão 24

Questão
Mendel's principle of segregation implies that the two alleles of a gene in a diploid organism
Responda
  • are distributed to separate gametes during meiosis, with each gamete receiving one allele.
  • are inherited without relation to the alleles of another trait.
  • are assorted to the same gamete during meiosis.
  • may contaminate each other.
  • none of these

Questão 25

Questão
What is the relationship in the genetic information of a homologous pair of chromosomes?
Responda
  • The information is identical.
  • The information is the same in animals, but not in other organisms.
  • The information is the same in plants, but not in other organisms.
  • There is no similarity.
  • They carry information for the same traits, although the information is not necessarily identical.

Questão 26

Questão
In garden peas, tall (T) is dominant to dwarf (t). What are the chances of getting a dwarf plant from crossing a tall (Tt) plant with a dwarf (tt) plant? You must show your Punnett square to get full credit.
Responda
  • 0%
  • 25%
  • 50%
  • 75%
  • 100%

Questão 27

Questão
A useful tool for showing all possible combinations of gametes from a particular parental cross is a
Responda
  • monohybrid cross.
  • dihybrid cross.
  • filial generation.
  • Punnett square.
  • test cross.

Questão 28

Questão
A true breeding tall pea plant is crossed with a true breeding dwarf pea plant. All of the F1 offspring are tall. In words, how would you describe the genotype of the F1 plants?
Responda
  • homozygous dominant
  • homozygous recessive
  • heterozygous
  • tall
  • dwarf

Questão 29

Questão
The Hardy-Weinberg principle
Responda
  • can be used to see if a population is in genetic equilibrium.
  • can be used to see if evolution is occurring in a population.
  • applies to large populations, not small ones.
  • All of these
  • None of these

Questão 30

Questão
The rapid evolution of an ancestral population into many new species is called
Responda
  • polyploidy.
  • adaptive radiation.
  • cline formation.
  • sympatric speciation.
  • allopolyploidy.

Questão 31

Questão
Who proposed that evolution is "descent with modification"?
Responda
  • Lamarck
  • Malthus
  • Aristotle
  • Darwin
  • Mendel

Questão 32

Questão
Organs that are similar in underlying form in different organisms due to a common evolutionary origin are ____ organs or structures.
Responda
  • convergent
  • homologous
  • homoplastic
  • vestigial
  • none of these

Questão 33

Questão
Independent evolution of similar structures in unrelated organisms, as a result of adaptation to similar environments is known as ____ evolution.
Responda
  • homologous
  • homoplastic
  • vestigial
  • convergent
  • biotic

Questão 34

Questão
Darwin thought that the major driving force in evolution was
Responda
  • natural selection.
  • mutation.
  • gradualism.
  • molecular biology.
  • wars and famine.

Questão 35

Questão
Allopatric speciation occurs when
Responda
  • members of a species evolve into two separate species, while living in the same area.
  • members of two species are separated from one another geographically.
  • members of two species overcome isolating mechanisms and interbreed.
  • two different species evolve to look alike, even though they are not closely related.
  • members of a species are separated geographically and after subsequent evolution are unable to interbreed

Questão 36

Questão
In populations that are not evolving,
Responda
  • the allele frequencies will change randomly.
  • the allele frequencies remain constant from generation to generation.
  • microevolution is occurring.
  • the Hardy-Weinberg principle is not applied.
  • macroevolution is occurring.

Questão 37

Questão
Sympatric speciation occurs when
Responda
  • members of a species evolve into two separate species, while living in the same area.
  • members of two species are separated from one another geographically.
  • members of the same species overcome isolating mechanisms and interbreed.
  • two different species evolve to look alike, even though they are not closely related.
  • members of a species are separated geographically, and after subsequent evolution are unable to interbreed.

Questão 38

Questão
Stabilizing natural selection
Responda
  • favors phenotypes at one extreme.
  • is associated with populations well-adapted to their environment.
  • involves one phenotype gradually replacing another.
  • involves two or more phenotypes being favored.
  • selects against the intermediate phenotype.

Questão 39

Questão
The spine of the fishhook cactus and the tendrils of the garden pea are both modified
Responda
  • leaves
  • stems.
  • flowers.
  • buds.
  • stipules

Questão 40

Questão
Microevolution
Responda
  • refers to the major changes that result in the formation of new species.
  • is the same as adaptive radiation.
  • involves relatively small or minor changes that take place within a population.
  • may change some alleles, but the gene pool does not change.
  • represents genetic equilibrium.

Questão 41

Questão
Gene flow is caused by
Responda
  • the loss of alleles due to chance.
  • migration between populations.
  • mutation.
  • natural selection.
  • random mating.

Questão 42

Questão
There are floral differences among some related species of plants that result in pollination by different pollinators. In this case, reproductive isolation is due to
Responda
  • timing differences.
  • structural differences.
  • embryo failure.
  • hybrid sterility.
  • none of these

Questão 43

Questão
Which of the following is an example of a mechanism for reproductive isolation between two species?
Responda
  • They flower at different times.
  • The embryo formed by the union of their gametes aborts.
  • The resulting offspring is not be able to reproduce.
  • They have floral structures that prevent insects from cross-pollinating them.
  • All of these are reproductive isolating mechanisms.

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