A group of individuals of the same species that occupies a given area is referred to as a(n) ___.
A. Community B. Population C. Ecosystem D. Biome - ANSWERSPopulation
Ecology is the scientific study of the relationship between ________and their environment.
A. Individuals
B. Population
C....
Ecology and Evolution Exam #1
Questions & Answers
A group of individuals of the same species that occupies a given area is referred to as
a(n) ___.
A. Community B. Population C. Ecosystem D. Biome - ANSWERSPopulation
Ecology is the scientific study of the relationship between ________and their
environment.
A. Individuals
B. Population
C. Ecosystem
D. Organisms - ANSWERSOrganisms
In a field experiment, an ecologist measures the effects of nitrogen on productivity,
plotting data for nitrogen on the x-axis and productivity on the y-axis. In this experiment,
the dependent variable is ________.
A. Nitrogen B. Date C. Productivity D. Effects of nitrogen - ANSWERSProductivity
Which of the following is considered an abiotic component of the ecosystem?
A. temperature B. microbes C. plants D. animals - ANSWERSTemperature
A hypothesis refers to a(n) ______.
A. phenomenon that is observed but is not yet understood.
B. testable explanation for an observed phenomenon.
C. untestable explanation for an observed phenomenon.
D. falsified explanation for an observed phenomenon. - ANSWERSa testable
explanation for an observed phenomenon.
________ is the differential success of individuals in a population in response to
environmental conditions.
A. Evolution
B. Adaptation
C. Natural selection
D. Differentiation - ANSWERSNatural Selection
The fitness of an individual is measured by _______.
A. the proportion of heterozygous alleles within its genome.
B. its body size.
C. its efficiency in obtaining energy.
D. the proportionate contribution it makes to future generations. - ANSWERSthe
proportionate contribution it makes to future generations.
, The specific heritable traits of a particular organism enabling it to survive, grow, and
reproduce within a given environment are called ______.
A. mutations.
B. genes.
C. adaptations.
D. genotypes. - ANSWERSAdaptations
The gene pool refers to all of the genetic information within a ____.
A. cell.
B. individual.
C. population.
D. species. - ANSWERSPopulation
The expression of different phenotypic traits for a given genotype under different
environmental conditions is referred to as _________.
A. mutation.
B. phenotypic plasticity.
C. adaptation.
D. habituation - ANSWERSphenotypic plasticity.
If birds with larger beaks are favored by the environment, it is likely that ________
selection will occur.
A. directional
B. disruptive
C. stabilizing
D. standardizing - ANSWERSdirectional
Measurements of bill length in a population of seed-eating birds reveal two distinct
groups: small-billed individuals feeding on soft-shelled seeds and large-billed individuals
feeding on hard-shelled seeds. This bimodal distribution most likely resulted from ____.
A. stabilizing selection.
B. natural selection.
C. directional selection.
D. disruptive selection. - ANSWERSdisruptive selection
What is the primary original source of genetic variation in a population?
A. mutation
B. genetic drift
C. blending inheritance
D. cloning - ANSWERSMutation
Under which of the following conditions would genetic drift exert the greatest influence?
A. a population with a large range
B. a very small population
C. a very large population
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