Biology 1407- Exam 1 Questions and Answers
Question 1.
How are two different species most likely to evolve from one ancestral species? A.
Sympatrically, by a point mutation affecting morphology or behavior. B. Sympatrically, due
to extensive inbreeding. C. Allopatrically, due to extensive breeding. D. Allopatrically, after
the ancestral species has split into two populations.
Correct Answer: D. Allopatrically, after the ancestral species has split into two
populations.
Question 2.
What is the goal of bioremediation? A. To improve human health with the help of living
organisms such as bacteria. B. To clean up areas polluted with toxic compounds by using
bacteria. C. To improve soil quality for plant growth by using bacteria. D. To improve
bacteria for production of useful chemicals.
Correct Answer: B. To clean up areas polluted with toxic compounds by using
bacteria.
Question 3.
Which of the following pairs of protists and their characteristics is mismatched? A.
Apicomplexans ----- internal parasites. B. Euglenozoans ----- unicellular flagellates. C.
Ciliates ----- red tide organisms. D. Entamoebas ---- ingestive feedback.
Correct Answer: C. Ciliates ----- red tide organisms.
Question 4.
When a mosquito infected with Plasmodium first bites a human, the Plasmodium _______.
A. gametes fuse, forming an oocyst. B. cells infect the human liver cells. C. cells cause
lysing of the human red blood cells. D. oocyst undergoes meiosis.
Correct Answer: B. cells infect the human liver cells.
Question 5.
A population of organisms will not evolve if _____. A. all individual variation is due only to
environmental factors. B. the environment is changing at a relatively slow rate. C. the
population size is large. D. the population lives in a habitat without competing species
present.
Correct Answer: A. all individual variation is due only to environmental factors.
Question 6.
In most fungi, karyogamy does not immediately follow plamogamy, which consequently
________. A. means that sexual reproduction can occur in specialized structures. B. results
in multiple diploid nuclei per cell. C. allows fungi to reproduce asexually most of the time.
D. results in heterokaryotic or dikaryotic cells.
Correct Answer: B. results in multiple diploid nuclei per cell.
Question 7.
Arrange the following in order from largest to smallest, assuming that they all come from
the same fungus. 1. Basidiocarp 2. Basidium 3. Basidiospore 4. Mycelium 5. Gill A. 4 ’ 5 ’ 1
’ 2 ’ 3 B. 5 ’ 1 ’ 4 ’ 2 ’ 3 C. 5 ’ 1 ’ 3 ’ 2 ’ 4 D. 4 ’ 1 ’ 5 ’ 2 ’ 3
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, Correct Answer: D. 4 ’ 1 ’ 5 ’ 2 ’ 3
Question 8.
All protists are ______. A. unicellular. B. eukaryotic. C. symbionts. D. mixotrophic.
Correct Answer: B. eukaryotic.
Question 9.
After the drought of 1977, researchers hypothesized that on the Galápagos island Daphne
Major, medium ground finches with large, deep beaks survived better than those with
smaller beaks because they could more easily crack and eat the tough Tribulus cistoides
fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds
(different types and sizes) so that tourists can get a better look at the finches. Which of
these events is now most likely to occur to finch beaks on this island? A. Evolution of yet
larger, deeper beaks over time, until all birds have relatively large, deep beaks. B.
Evolution of smaller, pointier beaks over time, until all birds have relatively small, pointy
beaks. C. Increased variation in beak size and shape over time. D. No change in beak size
and shape over time.
Correct Answer: C. Increased variation in beak size and shape over time.
Question 10.
The production of sterile mules by interbreeding between female horses (mares) and male
donkeys (jacks) is an example of ___________. A. reduced hybrid viability. B. hybrid
breakdown. C. reduced hybrid fertility. D. mechanical isolation.
Correct Answer: C. reduced hybrid fertility.
Question 11.
Starting from the wild mustard Brassica oleracea, breeders have created the strains known
as Brussels sprouts, broccoli, kale, and cabbage. Therefore, which of the following
statements is correct? A. In this wild mustard, there is enough heritable variation to permit
these different varieties. B. Heritable variation is low in wild mustard—otherwise this wild
strain would have different characteristics. C. Natural selection is rare in wild populations
of wild mustard. D. In wild mustard, most of the variation is due to differences in soil or
other aspects of the environment.
Correct Answer: A. In this wild mustard, there is enough heritable variation to
permit these different varieties.
Question 12.
Darwin and Wallace were the first to propose ________. A. that evolution occurs. B. a
mechanism for how evolution occurs. C. that Earth is older than a few thousand years. D.
natural selection as the mechanism of evolution.
Correct Answer: D. natural selection as the mechanism of evolution.
Question 13.
Two populations of birds with somewhat different coloration live on opposite sides of a
peninsula. The habitat between the populations is not suitable for these birds. When birds
from the two populations are brought together, they produce young whose appearance is
intermediate between the two parents. These offspring will breed with each other or with
birds from either parent population, and all offspring of these pairings appear intermediate
Page 2
Question 1.
How are two different species most likely to evolve from one ancestral species? A.
Sympatrically, by a point mutation affecting morphology or behavior. B. Sympatrically, due
to extensive inbreeding. C. Allopatrically, due to extensive breeding. D. Allopatrically, after
the ancestral species has split into two populations.
Correct Answer: D. Allopatrically, after the ancestral species has split into two
populations.
Question 2.
What is the goal of bioremediation? A. To improve human health with the help of living
organisms such as bacteria. B. To clean up areas polluted with toxic compounds by using
bacteria. C. To improve soil quality for plant growth by using bacteria. D. To improve
bacteria for production of useful chemicals.
Correct Answer: B. To clean up areas polluted with toxic compounds by using
bacteria.
Question 3.
Which of the following pairs of protists and their characteristics is mismatched? A.
Apicomplexans ----- internal parasites. B. Euglenozoans ----- unicellular flagellates. C.
Ciliates ----- red tide organisms. D. Entamoebas ---- ingestive feedback.
Correct Answer: C. Ciliates ----- red tide organisms.
Question 4.
When a mosquito infected with Plasmodium first bites a human, the Plasmodium _______.
A. gametes fuse, forming an oocyst. B. cells infect the human liver cells. C. cells cause
lysing of the human red blood cells. D. oocyst undergoes meiosis.
Correct Answer: B. cells infect the human liver cells.
Question 5.
A population of organisms will not evolve if _____. A. all individual variation is due only to
environmental factors. B. the environment is changing at a relatively slow rate. C. the
population size is large. D. the population lives in a habitat without competing species
present.
Correct Answer: A. all individual variation is due only to environmental factors.
Question 6.
In most fungi, karyogamy does not immediately follow plamogamy, which consequently
________. A. means that sexual reproduction can occur in specialized structures. B. results
in multiple diploid nuclei per cell. C. allows fungi to reproduce asexually most of the time.
D. results in heterokaryotic or dikaryotic cells.
Correct Answer: B. results in multiple diploid nuclei per cell.
Question 7.
Arrange the following in order from largest to smallest, assuming that they all come from
the same fungus. 1. Basidiocarp 2. Basidium 3. Basidiospore 4. Mycelium 5. Gill A. 4 ’ 5 ’ 1
’ 2 ’ 3 B. 5 ’ 1 ’ 4 ’ 2 ’ 3 C. 5 ’ 1 ’ 3 ’ 2 ’ 4 D. 4 ’ 1 ’ 5 ’ 2 ’ 3
Page 1
, Correct Answer: D. 4 ’ 1 ’ 5 ’ 2 ’ 3
Question 8.
All protists are ______. A. unicellular. B. eukaryotic. C. symbionts. D. mixotrophic.
Correct Answer: B. eukaryotic.
Question 9.
After the drought of 1977, researchers hypothesized that on the Galápagos island Daphne
Major, medium ground finches with large, deep beaks survived better than those with
smaller beaks because they could more easily crack and eat the tough Tribulus cistoides
fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds
(different types and sizes) so that tourists can get a better look at the finches. Which of
these events is now most likely to occur to finch beaks on this island? A. Evolution of yet
larger, deeper beaks over time, until all birds have relatively large, deep beaks. B.
Evolution of smaller, pointier beaks over time, until all birds have relatively small, pointy
beaks. C. Increased variation in beak size and shape over time. D. No change in beak size
and shape over time.
Correct Answer: C. Increased variation in beak size and shape over time.
Question 10.
The production of sterile mules by interbreeding between female horses (mares) and male
donkeys (jacks) is an example of ___________. A. reduced hybrid viability. B. hybrid
breakdown. C. reduced hybrid fertility. D. mechanical isolation.
Correct Answer: C. reduced hybrid fertility.
Question 11.
Starting from the wild mustard Brassica oleracea, breeders have created the strains known
as Brussels sprouts, broccoli, kale, and cabbage. Therefore, which of the following
statements is correct? A. In this wild mustard, there is enough heritable variation to permit
these different varieties. B. Heritable variation is low in wild mustard—otherwise this wild
strain would have different characteristics. C. Natural selection is rare in wild populations
of wild mustard. D. In wild mustard, most of the variation is due to differences in soil or
other aspects of the environment.
Correct Answer: A. In this wild mustard, there is enough heritable variation to
permit these different varieties.
Question 12.
Darwin and Wallace were the first to propose ________. A. that evolution occurs. B. a
mechanism for how evolution occurs. C. that Earth is older than a few thousand years. D.
natural selection as the mechanism of evolution.
Correct Answer: D. natural selection as the mechanism of evolution.
Question 13.
Two populations of birds with somewhat different coloration live on opposite sides of a
peninsula. The habitat between the populations is not suitable for these birds. When birds
from the two populations are brought together, they produce young whose appearance is
intermediate between the two parents. These offspring will breed with each other or with
birds from either parent population, and all offspring of these pairings appear intermediate
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