Exam 4 pt.1

Descripción

LEC. 17-19 Questions
Eboni Barnes
Test por Eboni Barnes, actualizado hace más de 1 año
Eboni Barnes
Creado por Eboni Barnes hace más de 7 años
18
1

Resumen del Recurso

Pregunta 1

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

Pregunta 2

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

Pregunta 3

Pregunta
The only fungi that have flagellated cells are the
Respuesta
  • ascomycetes
  • basidiomycetes
  • zygomycetes
  • chytrids
  • glomeromycetes

Pregunta 4

Pregunta
Rhizopus nigricans is a member of the phylum
Respuesta
  • Zygomycota
  • Chytridiomycota
  • Ascomycota
  • Glomeromycota
  • Basidiomycota

Pregunta 5

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

Pregunta 6

Pregunta
Mycorrhizae are a
Respuesta
  • 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

Pregunta 7

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

Pregunta 8

Pregunta
Mushrooms belong to the phylum
Respuesta
  • Ascomyceta
  • Basidiomycota
  • Zygomycota
  • Glomeromycota
  • Chytridiomycota

Pregunta 9

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

Pregunta 10

Pregunta
Most fungi produce filaments called
Respuesta
  • hyphae
  • mycorrhizae
  • conidia
  • sporangia
  • none of these

Pregunta 11

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

Pregunta 12

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

Pregunta 13

Pregunta
Conidia are
Respuesta
  • asexual spores
  • sporangia
  • hyphae
  • arbuscules
  • basidia

Pregunta 14

Pregunta
The sac fungi belong to the phylum
Respuesta
  • Zygomycota
  • Chytridiomycota
  • Ascomycota
  • Glomeromycota
  • Basidiomycota

Pregunta 15

Pregunta
Mendel's principle of dominance implies that
Respuesta
  • 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

Pregunta 16

Pregunta
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?
Respuesta
  • TT
  • Tt
  • tt
  • TTt
  • tT

Pregunta 17

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

Pregunta 18

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

Pregunta 19

Pregunta
Recessive traits
Respuesta
  • 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.

Pregunta 20

Pregunta
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?
Respuesta
  • 1:1:1:1
  • 9:3:3:1
  • 3:1
  • 9:7
  • 1:1

Pregunta 21

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

Pregunta 22

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

Pregunta 23

Pregunta
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.
Respuesta
  • 0%
  • 25%
  • 50%
  • 75%
  • 100%

Pregunta 24

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

Pregunta 25

Pregunta
What is the relationship in the genetic information of a homologous pair of chromosomes?
Respuesta
  • 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.

Pregunta 26

Pregunta
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.
Respuesta
  • 0%
  • 25%
  • 50%
  • 75%
  • 100%

Pregunta 27

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

Pregunta 28

Pregunta
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?
Respuesta
  • homozygous dominant
  • homozygous recessive
  • heterozygous
  • tall
  • dwarf

Pregunta 29

Pregunta
The Hardy-Weinberg principle
Respuesta
  • 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

Pregunta 30

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

Pregunta 31

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

Pregunta 32

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

Pregunta 33

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

Pregunta 34

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

Pregunta 35

Pregunta
Allopatric speciation occurs when
Respuesta
  • 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

Pregunta 36

Pregunta
In populations that are not evolving,
Respuesta
  • 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.

Pregunta 37

Pregunta
Sympatric speciation occurs when
Respuesta
  • 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.

Pregunta 38

Pregunta
Stabilizing natural selection
Respuesta
  • 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.

Pregunta 39

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

Pregunta 40

Pregunta
Microevolution
Respuesta
  • 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.

Pregunta 41

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

Pregunta 42

Pregunta
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
Respuesta
  • timing differences.
  • structural differences.
  • embryo failure.
  • hybrid sterility.
  • none of these

Pregunta 43

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