8978152
Descripción
Test por Eboni Barnes, actualizado hace más de 1 año
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Creado por Eboni Barnes
hace casi 7 años
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Pregunta 1
Pregunta
Lichens are made up of two different kinds of organisms living in a symbiotic relationship. The two organisms are
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an alga or cyanobacterium and a fungus
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a protozoon and a fungus
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a fungus and the roots of a plant
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a plant and an animal
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a bacterium and a protozoon
Pregunta 2
Pregunta
In the basidiomycete life cycle, the only diploid cell is the
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zygote
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zygospore
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conidium
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primary mycelium
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secondary mycelium
Pregunta 3
Pregunta
The only fungi that have flagellated cells are the
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ascomycetes
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basidiomycetes
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zygomycetes
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chytrids
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glomeromycetes
Pregunta 4
Pregunta
Rhizopus nigricans is a member of the phylum
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Zygomycota
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Chytridiomycota
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Ascomycota
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Glomeromycota
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Basidiomycota
Pregunta 5
Pregunta
Large reproductive structures produced by some fungi are called
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mycelia
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mycorrhizae
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hyphae
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fruiting bodies
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conidia
Pregunta 6
Pregunta
Mycorrhizae are a
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symbiotic association between a termite and a fungus
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symbiotic association between an alga and a fungus
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symbiotic association between a fungus and a plant root
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parasitic association between a bacterium and a plant root
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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
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foliose
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crustose
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globose
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laminose
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fruticose
Pregunta 8
Pregunta
Mushrooms belong to the phylum
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Ascomyceta
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Basidiomycota
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Zygomycota
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Glomeromycota
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Chytridiomycota
Pregunta 9
Pregunta
In a mycorrhizal association, the plant provides ____ to the ____.
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phosphorous; lichen
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sugars; fungus
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amino acids; alga
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nitrogen; bacterium
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water; alga
Pregunta 10
Pregunta
Most fungi produce filaments called
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hyphae
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mycorrhizae
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conidia
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sporangia
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none of these
Pregunta 11
Pregunta
Hyphae that contain two genetically distinct nuclei within each cell are referred to as
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haploid
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diploid
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dikaryotic
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polyploid
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none of these
Pregunta 12
Pregunta
In the ascomycetes, meiosis occurs inside a(n)
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conidium
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sporangium
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ascus
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arbuscule
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basidium
Pregunta 13
Pregunta
Conidia are
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asexual spores
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sporangia
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hyphae
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arbuscules
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basidia
Pregunta 14
Pregunta
The sac fungi belong to the phylum
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Zygomycota
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Chytridiomycota
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Ascomycota
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Glomeromycota
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Basidiomycota
Pregunta 15
Pregunta
Mendel's principle of dominance implies that
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alleles cannot be expressed unless they are both the same.
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alleles are the carriers of genetic information.
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both alleles are expressed equally.
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only one allele is expressed in the heterozygous condition.
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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?
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TT
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Tt
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tt
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TTt
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tT
Pregunta 17
Pregunta
A parent heterozygous for two traits will produce ____ types of gametes with respect to those traits.
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2
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3
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4
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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
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both homozygous dominant.
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both homozygous recessive.
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both heterozygous.
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one homozygous dominant and the other homozygous recessive.
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one homozygous recessive and the other heterozygous.
Pregunta 19
Pregunta
Recessive traits
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are expressed only if the organism is heterozygous.
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are expressed only if the organism is homozygous recessive.
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are never expressed.
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never skip a generation.
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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?
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1:1:1:1
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9:3:3:1
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3:1
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9:7
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1:1
Pregunta 21
Pregunta
A tall pea plant (TT) and a different tall pea plant (Tt) have the same
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alleles.
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genetic makeup.
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genotype.
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offspring.
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phenotype.
Pregunta 22
Pregunta
A dihybrid cross
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involves diploid individuals.
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involves individuals differing in one trait.
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involves individuals differing in two traits.
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involves individuals with polygenes.
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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.
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0%
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25%
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50%
-
75%
-
100%
Pregunta 24
Pregunta
Mendel's principle of segregation implies that the two alleles of a gene in a diploid organism
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are distributed to separate gametes during meiosis, with each gamete receiving one allele.
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are inherited without relation to the alleles of another trait.
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are assorted to the same gamete during meiosis.
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may contaminate each other.
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none of these
Pregunta 25
Pregunta
What is the relationship in the genetic information of a homologous pair of chromosomes?
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The information is identical.
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The information is the same in animals, but not in other organisms.
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The information is the same in plants, but not in other organisms.
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There is no similarity.
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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.
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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
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monohybrid cross.
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dihybrid cross.
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filial generation.
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Punnett square.
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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?
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homozygous dominant
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homozygous recessive
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heterozygous
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tall
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dwarf
Pregunta 29
Pregunta
The Hardy-Weinberg principle
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can be used to see if a population is in genetic equilibrium.
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can be used to see if evolution is occurring in a population.
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applies to large populations, not small ones.
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All of these
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None of these
Pregunta 30
Pregunta
The rapid evolution of an ancestral population into many new species is called
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polyploidy.
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adaptive radiation.
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cline formation.
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sympatric speciation.
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allopolyploidy.
Pregunta 31
Pregunta
Who proposed that evolution is "descent with modification"?
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Lamarck
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Malthus
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Aristotle
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Darwin
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Mendel
Pregunta 32
Pregunta
Organs that are similar in underlying form in different organisms due to a common evolutionary origin are ____ organs or structures.
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convergent
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homologous
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homoplastic
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vestigial
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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.
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homologous
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homoplastic
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vestigial
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convergent
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biotic
Pregunta 34
Pregunta
Darwin thought that the major driving force in evolution was
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natural selection.
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mutation.
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gradualism.
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molecular biology.
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wars and famine.
Pregunta 35
Pregunta
Allopatric speciation occurs when
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members of a species evolve into two separate species, while living in the same area.
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members of two species are separated from one another geographically.
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members of two species overcome isolating mechanisms and interbreed.
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two different species evolve to look alike, even though they are not closely related.
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members of a species are separated geographically and after subsequent evolution are unable to interbreed
Pregunta 36
Pregunta
In populations that are not evolving,
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the allele frequencies will change randomly.
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the allele frequencies remain constant from generation to generation.
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microevolution is occurring.
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the Hardy-Weinberg principle is not applied.
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macroevolution is occurring.
Pregunta 37
Pregunta
Sympatric speciation occurs when
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members of a species evolve into two separate species, while living in the same area.
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members of two species are separated from one another geographically.
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members of the same species overcome isolating mechanisms and interbreed.
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two different species evolve to look alike, even though they are not closely related.
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members of a species are separated geographically, and after subsequent evolution are unable to interbreed.
Pregunta 38
Pregunta
Stabilizing natural selection
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favors phenotypes at one extreme.
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is associated with populations well-adapted to their environment.
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involves one phenotype gradually replacing another.
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involves two or more phenotypes being favored.
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selects against the intermediate phenotype.
Pregunta 39
Pregunta
The spine of the fishhook cactus and the tendrils of the garden pea are both modified
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leaves
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stems.
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flowers.
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buds.
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stipules
Pregunta 40
Pregunta
Microevolution
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refers to the major changes that result in the formation of new species.
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is the same as adaptive radiation.
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involves relatively small or minor changes that take place within a population.
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may change some alleles, but the gene pool does not change.
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represents genetic equilibrium.
Pregunta 41
Pregunta
Gene flow is caused by
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the loss of alleles due to chance.
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migration between populations.
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mutation.
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natural selection.
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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
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timing differences.
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structural differences.
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embryo failure.
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hybrid sterility.
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none of these
Pregunta 43
Pregunta
Which of the following is an example of a mechanism for reproductive isolation between two species?
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They flower at different times.
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The embryo formed by the union of their gametes aborts.
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The resulting offspring is not be able to reproduce.
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They have floral structures that prevent insects from cross-pollinating them.
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All of these are reproductive isolating mechanisms.
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