Test
Exam 4 pt.1
Preguntas del test (43)
1Lichens are made up of two different kinds of organisms living in a symbiotic relationship. The two organisms are
- Aan alga or cyanobacterium and a fungus
- Ba protozoon and a fungus
- Ca fungus and the roots of a plant
- Da plant and an animal
- Ea bacterium and a protozoon
2In the basidiomycete life cycle, the only diploid cell is the
- Azygote
- Bzygospore
- Cconidium
- Dprimary mycelium
- Esecondary mycelium
3The only fungi that have flagellated cells are the
- Aascomycetes
- Bbasidiomycetes
- Czygomycetes
- Dchytrids
- Eglomeromycetes
4Rhizopus nigricans is a member of the phylum
- AZygomycota
- BChytridiomycota
- CAscomycota
- DGlomeromycota
- EBasidiomycota
5Large reproductive structures produced by some fungi are called
- Amycelia
- Bmycorrhizae
- Chyphae
- Dfruiting bodies
- Econidia
6Mycorrhizae are a
- Asymbiotic association between a termite and a fungus
- Bsymbiotic association between an alga and a fungus
- Csymbiotic association between a fungus and a plant root
- Dparasitic association between a bacterium and a plant root
- Eparasitic association between a bacterium and a lichen
7When a lichen has a flat appearance and grows tightly attached to a rock the lichen is described as being
- Afoliose
- Bcrustose
- Cglobose
- Dlaminose
- Efruticose
8Mushrooms belong to the phylum
- AAscomyceta
- BBasidiomycota
- CZygomycota
- DGlomeromycota
- EChytridiomycota
9In a mycorrhizal association, the plant provides ____ to the ____.
- Aphosphorous; lichen
- Bsugars; fungus
- Camino acids; alga
- Dnitrogen; bacterium
- Ewater; alga
10Most fungi produce filaments called
- Ahyphae
- Bmycorrhizae
- Cconidia
- Dsporangia
- Enone of these
11Hyphae that contain two genetically distinct nuclei within each cell are referred to as
- Ahaploid
- Bdiploid
- Cdikaryotic
- Dpolyploid
- Enone of these
12In the ascomycetes, meiosis occurs inside a(n)
- Aconidium
- Bsporangium
- Cascus
- Darbuscule
- Ebasidium
13Conidia are
- Aasexual spores
- Bsporangia
- Chyphae
- Darbuscules
- Ebasidia
14The sac fungi belong to the phylum
- AZygomycota
- BChytridiomycota
- CAscomycota
- DGlomeromycota
- EBasidiomycota
15Mendel's principle of dominance implies that
- Aalleles cannot be expressed unless they are both the same.
- Balleles are the carriers of genetic information.
- Cboth alleles are expressed equally.
- Donly one allele is expressed in the heterozygous condition.
- Enone of these
16A 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?
- ATT
- BTt
- Ctt
- DTTt
- EtT
17A parent heterozygous for two traits will produce ____ types of gametes with respect to those traits.
- A2
- B3
- C4
- D6
- E8
18If 76 out of 104 offspring express the dominant trait in a particular cross, the parents were most likely to be
- Aboth homozygous dominant.
- Bboth homozygous recessive.
- Cboth heterozygous.
- Done homozygous dominant and the other homozygous recessive.
- Eone homozygous recessive and the other heterozygous.
19Recessive traits
- Aare expressed only if the organism is heterozygous.
- Bare expressed only if the organism is homozygous recessive.
- Care never expressed.
- Dnever skip a generation.
- Ewill always be expressed.
20In 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?
- A1:1:1:1
- B9:3:3:1
- C3:1
- D9:7
- E1:1
21A tall pea plant (TT) and a different tall pea plant (Tt) have the same
- Aalleles.
- Bgenetic makeup.
- Cgenotype.
- Doffspring.
- Ephenotype.
22A dihybrid cross
- Ainvolves diploid individuals.
- Binvolves individuals differing in one trait.
- Cinvolves individuals differing in two traits.
- Dinvolves individuals with polygenes.
- Erequires two test crosses.
23In 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.
- A0%
- B25%
- C50%
- D75%
- E100%
24Mendel's principle of segregation implies that the two alleles of a gene in a diploid organism
- Aare distributed to separate gametes during meiosis, with each gamete receiving one allele.
- Bare inherited without relation to the alleles of another trait.
- Care assorted to the same gamete during meiosis.
- Dmay contaminate each other.
- Enone of these
25What is the relationship in the genetic information of a homologous pair of chromosomes?
- AThe information is identical.
- BThe information is the same in animals, but not in other organisms.
- CThe information is the same in plants, but not in other organisms.
- DThere is no similarity.
- EThey carry information for the same traits, although the information is not necessarily identical.
26In 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.
- A0%
- B25%
- C50%
- D75%
- E100%
27A useful tool for showing all possible combinations of gametes from a particular parental cross is a
- Amonohybrid cross.
- Bdihybrid cross.
- Cfilial generation.
- DPunnett square.
- Etest cross.
28A 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?
- Ahomozygous dominant
- Bhomozygous recessive
- Cheterozygous
- Dtall
- Edwarf
29The Hardy-Weinberg principle
- Acan be used to see if a population is in genetic equilibrium.
- Bcan be used to see if evolution is occurring in a population.
- Capplies to large populations, not small ones.
- DAll of these
- ENone of these
30The rapid evolution of an ancestral population into many new species is called
- Apolyploidy.
- Badaptive radiation.
- Ccline formation.
- Dsympatric speciation.
- Eallopolyploidy.
31Who proposed that evolution is "descent with modification"?
- ALamarck
- BMalthus
- CAristotle
- DDarwin
- EMendel
32Organs that are similar in underlying form in different organisms due to a common evolutionary origin are ____ organs or structures.
- Aconvergent
- Bhomologous
- Chomoplastic
- Dvestigial
- Enone of these
33Independent evolution of similar structures in unrelated organisms, as a result of adaptation to similar environments is known as ____ evolution.
- Ahomologous
- Bhomoplastic
- Cvestigial
- Dconvergent
- Ebiotic
34Darwin thought that the major driving force in evolution was
- Anatural selection.
- Bmutation.
- Cgradualism.
- Dmolecular biology.
- Ewars and famine.
35Allopatric speciation occurs when
- Amembers of a species evolve into two separate species, while living in the same area.
- Bmembers of two species are separated from one another geographically.
- Cmembers of two species overcome isolating mechanisms and interbreed.
- Dtwo different species evolve to look alike, even though they are not closely related.
- Emembers of a species are separated geographically and after subsequent evolution are unable to interbreed
36In populations that are not evolving,
- Athe allele frequencies will change randomly.
- Bthe allele frequencies remain constant from generation to generation.
- Cmicroevolution is occurring.
- Dthe Hardy-Weinberg principle is not applied.
- Emacroevolution is occurring.
37Sympatric speciation occurs when
- Amembers of a species evolve into two separate species, while living in the same area.
- Bmembers of two species are separated from one another geographically.
- Cmembers of the same species overcome isolating mechanisms and interbreed.
- Dtwo different species evolve to look alike, even though they are not closely related.
- Emembers of a species are separated geographically, and after subsequent evolution are unable to interbreed.
38Stabilizing natural selection
- Afavors phenotypes at one extreme.
- Bis associated with populations well-adapted to their environment.
- Cinvolves one phenotype gradually replacing another.
- Dinvolves two or more phenotypes being favored.
- Eselects against the intermediate phenotype.
39The spine of the fishhook cactus and the tendrils of the garden pea are both modified
- Aleaves
- Bstems.
- Cflowers.
- Dbuds.
- Estipules
40Microevolution
- Arefers to the major changes that result in the formation of new species.
- Bis the same as adaptive radiation.
- Cinvolves relatively small or minor changes that take place within a population.
- Dmay change some alleles, but the gene pool does not change.
- Erepresents genetic equilibrium.
41Gene flow is caused by
- Athe loss of alleles due to chance.
- Bmigration between populations.
- Cmutation.
- Dnatural selection.
- Erandom mating.
42There are floral differences among some related species of plants that result in pollination by different pollinators. In this case, reproductive isolation is due to
- Atiming differences.
- Bstructural differences.
- Cembryo failure.
- Dhybrid sterility.
- Enone of these
43Which of the following is an example of a mechanism for reproductive isolation between two species?
- AThey flower at different times.
- BThe embryo formed by the union of their gametes aborts.
- CThe resulting offspring is not be able to reproduce.
- DThey have floral structures that prevent insects from cross-pollinating them.
- EAll of these are reproductive isolating mechanisms.
Información
- Descripción
- LEC. 17-19 Questions
- Autor
- Eboni Barnes
- Idioma
- English
- Visitas
- 63
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