Eboni Barnes
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LEC. 17-19 Questions

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Eboni Barnes
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Exam 4 pt.1

Question 1 of 43

1

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

Select one of the following:

  • 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

Explanation

Question 2 of 43

1

In the basidiomycete life cycle, the only diploid cell is the

Select one of the following:

  • zygote

  • zygospore

  • conidium

  • primary mycelium

  • secondary mycelium

Explanation

Question 3 of 43

1

The only fungi that have flagellated cells are the

Select one of the following:

  • ascomycetes

  • basidiomycetes

  • zygomycetes

  • chytrids

  • glomeromycetes

Explanation

Question 4 of 43

1

Rhizopus nigricans is a member of the phylum

Select one of the following:

  • Zygomycota

  • Chytridiomycota

  • Ascomycota

  • Glomeromycota

  • Basidiomycota

Explanation

Question 5 of 43

1

Large reproductive structures produced by some fungi are called

Select one of the following:

  • mycelia

  • mycorrhizae

  • hyphae

  • fruiting bodies

  • conidia

Explanation

Question 6 of 43

1

Mycorrhizae are a

Select one of the following:

  • 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

Explanation

Question 7 of 43

1

When a lichen has a flat appearance and grows tightly attached to a rock the lichen is described as being

Select one of the following:

  • foliose

  • crustose

  • globose

  • laminose

  • fruticose

Explanation

Question 8 of 43

1

Mushrooms belong to the phylum

Select one of the following:

  • Ascomyceta

  • Basidiomycota

  • Zygomycota

  • Glomeromycota

  • Chytridiomycota

Explanation

Question 9 of 43

1

In a mycorrhizal association, the plant provides ____ to the ____.

Select one of the following:

  • phosphorous; lichen

  • sugars; fungus

  • amino acids; alga

  • nitrogen; bacterium

  • water; alga

Explanation

Question 10 of 43

1

Most fungi produce filaments called

Select one of the following:

  • hyphae

  • mycorrhizae

  • conidia

  • sporangia

  • none of these

Explanation

Question 11 of 43

1

Hyphae that contain two genetically distinct nuclei within each cell are referred to as

Select one of the following:

  • haploid

  • diploid

  • dikaryotic

  • polyploid

  • none of these

Explanation

Question 12 of 43

1

In the ascomycetes, meiosis occurs inside a(n)

Select one of the following:

  • conidium

  • sporangium

  • ascus

  • arbuscule

  • basidium

Explanation

Question 13 of 43

1

Conidia are

Select one of the following:

  • asexual spores

  • sporangia

  • hyphae

  • arbuscules

  • basidia

Explanation

Question 14 of 43

1

The sac fungi belong to the phylum

Select one of the following:

  • Zygomycota

  • Chytridiomycota

  • Ascomycota

  • Glomeromycota

  • Basidiomycota

Explanation

Question 15 of 43

1

Mendel's principle of dominance implies that

Select one of the following:

  • 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

Explanation

Question 16 of 43

1

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?

Select one of the following:

  • TT

  • Tt

  • tt

  • TTt

  • tT

Explanation

Question 17 of 43

1

A parent heterozygous for two traits will produce ____ types of gametes with respect to those traits.

Select one of the following:

  • 2

  • 3

  • 4

  • 6

  • 8

Explanation

Question 18 of 43

1

If 76 out of 104 offspring express the dominant trait in a particular cross, the parents were most likely to be

Select one of the following:

  • both homozygous dominant.

  • both homozygous recessive.

  • both heterozygous.

  • one homozygous dominant and the other homozygous recessive.

  • one homozygous recessive and the other heterozygous.

Explanation

Question 19 of 43

1

Recessive traits

Select one of the following:

  • 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.

Explanation

Question 20 of 43

1

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?

Select one of the following:

  • 1:1:1:1

  • 9:3:3:1

  • 3:1

  • 9:7

  • 1:1

Explanation

Question 21 of 43

1

A tall pea plant (TT) and a different tall pea plant (Tt) have the same

Select one of the following:

  • alleles.

  • genetic makeup.

  • genotype.

  • offspring.

  • phenotype.

Explanation

Question 22 of 43

1

A dihybrid cross

Select one of the following:

  • involves diploid individuals.

  • involves individuals differing in one trait.

  • involves individuals differing in two traits.

  • involves individuals with polygenes.

  • requires two test crosses.

Explanation

Question 23 of 43

1

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.

Select one of the following:

  • 0%

  • 25%

  • 50%

  • 75%

  • 100%

Explanation

Question 24 of 43

1

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

Select one of the following:

  • 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

Explanation

Question 25 of 43

1

What is the relationship in the genetic information of a homologous pair of chromosomes?

Select one of the following:

  • 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.

Explanation

Question 26 of 43

1

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.

Select one of the following:

  • 0%

  • 25%

  • 50%

  • 75%

  • 100%

Explanation

Question 27 of 43

1

A useful tool for showing all possible combinations of gametes from a particular parental cross is a

Select one of the following:

  • monohybrid cross.

  • dihybrid cross.

  • filial generation.

  • Punnett square.

  • test cross.

Explanation

Question 28 of 43

1

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?

Select one of the following:

  • homozygous dominant

  • homozygous recessive

  • heterozygous

  • tall

  • dwarf

Explanation

Question 29 of 43

1

The Hardy-Weinberg principle

Select one of the following:

  • 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

Explanation

Question 30 of 43

1

The rapid evolution of an ancestral population into many new species is called

Select one of the following:

  • polyploidy.

  • adaptive radiation.

  • cline formation.

  • sympatric speciation.

  • allopolyploidy.

Explanation

Question 31 of 43

1

Who proposed that evolution is "descent with modification"?

Select one of the following:

  • Lamarck

  • Malthus

  • Aristotle

  • Darwin

  • Mendel

Explanation

Question 32 of 43

1

Organs that are similar in underlying form in different organisms due to a common evolutionary origin are ____ organs or structures.

Select one of the following:

  • convergent

  • homologous

  • homoplastic

  • vestigial

  • none of these

Explanation

Question 33 of 43

1

Independent evolution of similar structures in unrelated organisms, as a result of adaptation to similar environments is known as ____ evolution.

Select one of the following:

  • homologous

  • homoplastic

  • vestigial

  • convergent

  • biotic

Explanation

Question 34 of 43

1

Darwin thought that the major driving force in evolution was

Select one of the following:

  • natural selection.

  • mutation.

  • gradualism.

  • molecular biology.

  • wars and famine.

Explanation

Question 35 of 43

1

Allopatric speciation occurs when

Select one of the following:

  • 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

Explanation

Question 36 of 43

1

In populations that are not evolving,

Select one of the following:

  • 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.

Explanation

Question 37 of 43

1

Sympatric speciation occurs when

Select one of the following:

  • 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.

Explanation

Question 38 of 43

1

Stabilizing natural selection

Select one of the following:

  • 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.

Explanation

Question 39 of 43

1

The spine of the fishhook cactus and the tendrils of the garden pea are both modified

Select one of the following:

  • leaves

  • stems.

  • flowers.

  • buds.

  • stipules

Explanation

Question 40 of 43

1

Microevolution

Select one of the following:

  • 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.

Explanation

Question 41 of 43

1

Gene flow is caused by

Select one of the following:

  • the loss of alleles due to chance.

  • migration between populations.

  • mutation.

  • natural selection.

  • random mating.

Explanation

Question 42 of 43

1

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

Select one of the following:

  • timing differences.

  • structural differences.

  • embryo failure.

  • hybrid sterility.

  • none of these

Explanation

Question 43 of 43

1

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

Select one of the following:

  • 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.

Explanation

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