Biology 19 The Evolution of Populations MCQ

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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

Unit 4. Evolutionary Processes

Chapter 19: The Evolution of Populations MCQ Multiple Choices Questions Quiz Test Bank

19.1 Population Evolution

19.2 Population Genetics

19.3 Adaptive Evolution

Quiz PDF eBook: 
Biology 19 The Evolution of Populations MCQ
Download Biology 19 Evolution Quiz PDF eBook
12 Pages
2015
English US
Educational Materials



Sample Questions from the Biology 19 The Evolution of Populations MCQ Quiz

Question: What is a cline?

Choices:

the slope of a mountain where a population lives

the degree to which a mutation helps an individual survive

the number of individuals in the population

gradual geographic variation across an ecological gradient

Question: What is the difference between micro- and macroevolution?

Choices:

Microevolution describes the evolution of small organisms, such as insects, while macroevolution describes the evolution of large organisms, like people and elephants.

Microevolution describes the evolution of microscopic entities, such as molecules and proteins, while macroevolution describes the evolution of whole organisms.

Microevolution describes the evolution of organisms in populations, while macroevolution describes the evolution of species over long periods of time.

Microevolution describes the evolution of organisms over their lifetimes, while macroevolution describes the evolution of organisms over multiple generations.

Question: When closely related individuals mate with each other, or inbreed, the offspring are often not as fit as the offspring of two unrelated individuals. Why?

Choices:

Close relatives are genetically incompatible.

The DNA of close relatives reacts negatively in the offspring.

Inbreeding can bring together rare, deleterious mutations that lead to harmful phenotypes.

Inbreeding causes normally silent alleles to be expressed.

Question: When males and females of a population look or act differently, it is referred to as ________.

Choices:

sexual dimorphism

sexual selection

diversifying selection

a cline

Question: Population genetics is the study of:

Choices:

how selective forces change the allele frequencies in a population over time

the genetic basis of population-wide traits

whether traits have a genetic basis

the degree of inbreeding in a population

Question: Which type of selection results in greater genetic variance in a population?

Choices:

stabilizing selection

directional selection

diversifying selection

positive frequency-dependent selection

Question: Which of the following populations is not in Hardy-Weinberg equilibrium?

Choices:

a population with 12 homozygous recessive individuals (yy), 8 homozygous dominant individuals (YY), and 4 heterozygous individuals (Yy)

a population in which the allele frequencies do not change over time

p2 + 2pq + q2 = 1

a population undergoing natural selection

Question: Which of the following evolutionary forces can introduce new genetic variation into a population?

Choices:

natural selection and genetic drift

mutation and gene flow

natural selection and nonrandom mating

mutation and genetic drift

Question: One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship's captain, who had polydactyly, a rare dominant trait, was one of the original colonists. Today, we see a much higher frequency of polydactyly in the Amish population. This is an example of:

Choices:

natural selection

genetic drift

founder effect

b and c

Question: What is assortative mating?

Choices:

when individuals mate with those who are similar to themselves

when individuals mate with those who are dissimilar to themselves

when individuals mate with those who are the most fit in the population

when individuals mate with those who are least fit in the population

Question: When male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms?

Choices:

natural selection

genetic drift

gene flow

random mating

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Source:  OpenStax College. Download for free at http://cnx.org/content/col16448/latest/
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