Population Size — Unit test Answers

0 verified answers1 views
1
Free Preview

Bottleneck events are always caused by the death of most of a species’ population.

A
T
B
F
2
Free Preview

A quaternary consumer species would be expected to have a smaller population than a secondary consumer species.

A
T
B
F
3

Which of the following conditions would lead to a small population size?

A
a low birth to death ratio
B
a high birth to death ratio
C
immigration
D
large number of resources
4

Which of the following selection pressures is responsible for the limited evolutionary changes experienced by alligators and other crocodilians?

A
stabilizing selection
B
directional selection
C
disruptive selection
D
high mutation rate
5

Orange trees planted in a grove or orchard would most likely fall in which category of population distribution?

A
even
B
random
C
clumped
D
density
6

The Great Burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. The seed then travels with the animal until it eventually falls off, which spreads the plant’s seeds farther than the plant could have done. What type of symbiotic relationship is this?

A
Mutualism
B
Commensalism
C
Parasitism
D
Competition
7

There are approximately 35,000 bald eagles in Alaska, which covers 586400 square miles. What is the population density for the bald eagles in Alaska?

A
17 bald eagles per square mile
B
0.04 bald eagles per square mile
C
0.06 bald eagles per square mile
D
1 bald eagle per square mile
8

Which of the following is not a part of Darwin’s theory of evolution?

A
Changes in organisms occur immediately.
B
Organisms change over time.
C
Species evolution occurs through natural selection.
D
Organisms developed from common ancestors.
9

Which of the following is most likely an example of genetic drift resulting from the founder effect?

A
The species’ physical habitat is limited.
B
The population expresses a mix of dominant and recessive traits.
C
The species occupies a small, specific niche.
D
A population commonly expresses traits that are otherwise rare in the species.
10

It is advantageous for a predator to prey exclusively on a single prey species.

A
T
B
F
11

Which of the following statements about logistic growth curves is true?

A
Logistic growth curves are common for R-selected species.
B
Logistic growth curves are J-shaped.
C
No organisms in nature experience logistic growth rates.
D
Logistic growth curves increase exponentially at first, then experience slowed growth rates.
12

What discovery led Darwin to develop his theories on adaptation?

A
The Galapagos islands contain a range of habitats.
B
The Galapagos islands originate from volcanoes.
C
The birds Darwin found in the Galapagos were different types of finches, not separate types of birds.
D
Many of the organisms in the Galapagos lived in hostile environments.
13

How can an increase in biodiversity lead to an increase in ecosystem stability?

A
A more biodiverse ecosystem is not subject to change.
B
A more biodiverse ecosystem has a higher chance of adapting to species changes.
C
A more biodiverse ecosystem has fewer species types to balance.
D
A more biodiverse ecosystem is subject to fewer natural disasters.
14

Variation of ecological habitats within a species is characteristic of which type of diversity?

A
Genetic diversity
B
Ecosystem diversity
C
Species diversity
D
Regional diversity
15

Which of the following species would you most expect to be distributed according to a regular pattern?

A
termites
B
stingless bees
C
fish
D
creosote bushes

Did you find these answers helpful?