AnswersCO-Biology B-CRCumulative Exam

Cumulative Exam — Cumulative exam Answers

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21
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Hyenas and lions have fierce battles over food. Which type of relationship does this describe?

A
parasitism
B
commensalism
C
predation
D
competition
22
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The figures below refer to a herd of water buffalo.Birth rate = 35 Death rate = 7Immigration = 4 Emigration = 17What is this population growth?

A
population increases by 41
B
population decreases by 15
C
population increases by 15
D
population decreases by 24
23

A Russian citizen has illegally obtained a Siberian tiger and is trying to sell the tiger’s fur in the United States. What treaty does this violate?

A
Tiger Treaty
B
Lacey Treaty
C
CITES
D
EPA
24

How are the tongue, ears, and nose a part of the nervous system?

A
They are sense organs that are part of the central nervous system.
B
They are sense organs that are part of the peripheral nervous system.
C
They are internal organs that are part of the central nervous system.
D
They are internal organs that are part of the peripheral nervous system.
25

Which of these can be found in both gymnosperms and angiosperms?

A
vascular tissue and exposed seeds
B
vascular tissue and seeds
C
flowers and vascular tissue
D
enclosed seeds and flowers
26

Which structure of the excretory system mainly functions in filtration?

A
ureter
B
kidney
C
urethra
D
bladder
27

Which of the following is an example of adaptive radiation?

A
One population of squirrels becomes two separate species over a long time.
B
One population of lizards forms 15 separate species over a short time.
C
One species of birds becomes better suited to its environment over time.
D
One species of fish forms when two species of fish begin to breed with each other.
28

Which best describes the movement through the nephron?

A
Blood is passed into the nephron and removed through the urethra.
B
All materials that exit the blood into the nephron are removed in the urine.
C
Some of the materials that exit the blood can be returned to the blood.
D
High quantities of sugars and water are excreted in the urine.
29

Which describes the primary function of the nervous system in keeping the body in homeostasis?

A
It processes the environment and sends out signals.
B
It controls movement and provides structure.
C
It physically breaks down and absorbs food.
D
It puts oxygen in the blood, which is essential for life.
30

Which scientist disproved the idea that life comes from nonlife?

A
Anton van Leeuwenhoek
B
Louis Pasteur
C
Robert Koch
D
Paul Ehrlich
31

Consider the phylogenetic tree.Which pair of organisms is most closely related to primates?

Question illustration
A
amphibians and rodents
B
crocodiles and amphibians
C
rodents and rabbits
D
dinosaurs and birds
32

A scientist measured an increase in nitrous oxide in the atmosphere. This increase would result in

A
an increase in the greenhouse effect.
B
a decrease in the greenhouse effect.
C
no change in the greenhouse effect.
D
a stabilization of the greenhouse effect.
33

The graph shows the changing levels of hormones during menstruation and ovulation. What happens to hormone levels during ovulation, and why is this important?

Question illustration
A
The hormone levels increase to prepare a woman’s body to receive a fertilized egg.
B
The hormone levels decrease to prepare a woman’s body to receive a fertilized egg.
C
The hormone levels increase, and the next menstrual cycle begins with shedding of the uterine lining.
D
The hormone levels decrease, and the next menstrual cycle begins with shedding of the uterine lining.
34

What is likely to happen to a healthy population that is experiencing exponential growth?

A
It will eventually reach its carrying capacity.
B
It will experience a population crash.
C
It will go extinct in the near future.
D
It will continue to grow exponentially indefinitely.
35

Which of the following examples can cause gene flow between populations?

A
an increase in predators to a population of zebra
B
a volcanic eruption that kills half of a population of mice
C
bird droppings that contain seeds from a different location
D
a person that sprays a toxin on a group of mosquitoes
36

A forest fire destroys an area. A small population of trees and a large population of birds are both affected. Which type of limiting factor causes this?

A
density dependent
B
density independent
C
population dependent
D
population independent
37

Brendan made a chart to categorize the characteristics of animals.

Question illustration
A
Have a backbone
B
Are warm-blooded
C
Are multicellular
D
Eat plants
38

If the data below were put into a bar graph, which animal would have the lowest bar on the bar graph?Number of Individuals in a Rocky Mountain Forest OrganismPopulationMountain lions150Bobcats300Coyotes10,000Deer25,000

A
mountain lions
B
bobcats
C
coyotes
D
deer
39

Which is a requirement for natural selection to occur?

A
heritable variations for some traits
B
the ability of an organism to improve a trait during its lifetime
C
equal probability of survival for all offspring
D
fewer offspring than the environment can support
40

Why is water considered to be abiotic?

A
because it is not part of the biosphere
B
because it came from something living
C
because it is dead
D
because it is not living and never lived

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