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Exam 4 pt.1

Beschreibung

LEC. 17-19 Questions
Eboni Barnes
Quiz von Eboni Barnes, aktualisiert more than 1 year ago
Eboni Barnes
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Zusammenfassung der Ressource

Frage 1

Frage
Lichens are made up of two different kinds of organisms living in a symbiotic relationship. The two organisms are
Antworten
  • 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

Frage 2

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

Frage 3

Frage
The only fungi that have flagellated cells are the
Antworten
  • ascomycetes
  • basidiomycetes
  • zygomycetes
  • chytrids
  • glomeromycetes

Frage 4

Frage
Rhizopus nigricans is a member of the phylum
Antworten
  • Zygomycota
  • Chytridiomycota
  • Ascomycota
  • Glomeromycota
  • Basidiomycota

Frage 5

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

Frage 6

Frage
Mycorrhizae are a
Antworten
  • 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

Frage 7

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

Frage 8

Frage
Mushrooms belong to the phylum
Antworten
  • Ascomyceta
  • Basidiomycota
  • Zygomycota
  • Glomeromycota
  • Chytridiomycota

Frage 9

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

Frage 10

Frage
Most fungi produce filaments called
Antworten
  • hyphae
  • mycorrhizae
  • conidia
  • sporangia
  • none of these

Frage 11

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

Frage 12

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

Frage 13

Frage
Conidia are
Antworten
  • asexual spores
  • sporangia
  • hyphae
  • arbuscules
  • basidia

Frage 14

Frage
The sac fungi belong to the phylum
Antworten
  • Zygomycota
  • Chytridiomycota
  • Ascomycota
  • Glomeromycota
  • Basidiomycota

Frage 15

Frage
Mendel's principle of dominance implies that
Antworten
  • 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

Frage 16

Frage
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?
Antworten
  • TT
  • Tt
  • tt
  • TTt
  • tT

Frage 17

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

Frage 18

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

Frage 19

Frage
Recessive traits
Antworten
  • 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.

Frage 20

Frage
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?
Antworten
  • 1:1:1:1
  • 9:3:3:1
  • 3:1
  • 9:7
  • 1:1

Frage 21

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

Frage 22

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

Frage 23

Frage
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.
Antworten
  • 0%
  • 25%
  • 50%
  • 75%
  • 100%

Frage 24

Frage
Mendel's principle of segregation implies that the two alleles of a gene in a diploid organism
Antworten
  • 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

Frage 25

Frage
What is the relationship in the genetic information of a homologous pair of chromosomes?
Antworten
  • 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.

Frage 26

Frage
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.
Antworten
  • 0%
  • 25%
  • 50%
  • 75%
  • 100%

Frage 27

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

Frage 28

Frage
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?
Antworten
  • homozygous dominant
  • homozygous recessive
  • heterozygous
  • tall
  • dwarf

Frage 29

Frage
The Hardy-Weinberg principle
Antworten
  • 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

Frage 30

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

Frage 31

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

Frage 32

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

Frage 33

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

Frage 34

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

Frage 35

Frage
Allopatric speciation occurs when
Antworten
  • 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

Frage 36

Frage
In populations that are not evolving,
Antworten
  • 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.

Frage 37

Frage
Sympatric speciation occurs when
Antworten
  • 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.

Frage 38

Frage
Stabilizing natural selection
Antworten
  • 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.

Frage 39

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

Frage 40

Frage
Microevolution
Antworten
  • 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.

Frage 41

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

Frage 42

Frage
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
Antworten
  • timing differences.
  • structural differences.
  • embryo failure.
  • hybrid sterility.
  • none of these

Frage 43

Frage
Which of the following is an example of a mechanism for reproductive isolation between two species?
Antworten
  • 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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