Answers25-26 Biology BCumulative Exam

Cumulative Exam — Cumulative exam Answers

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1
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Which organism is an animal-like protist?

A
cilia
B
dinoflagellate
C
amoeba
D
truffle
2
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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.
3

Imagine a person stepping on a pin and pulling his or her foot away. Look at the reflex arc of this scenario below.

Question illustration
A
The sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor.
B
The motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector.
C
The sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector.
D
The sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.
4

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
5

Which form of natural selection does the graph represent?

Question illustration
A
directional selection
B
disruptive selection
C
sexual selection
D
stabilizing selection
6

Plant reproduction requires the presence of auxins, as well as a large amount of sugar for energy. Which two main plant tissues work together to release sugar and carry hormones so that reproduction can take place?

A
leaves and dermal
B
stems and ground
C
dermal and vascular
D
ground and vascular
7

There is an algal bloom in a bay in a populated area. As the leading marine biologist in the area, what is the most important thing to do, based on scientific evidence about such blooms?

A
warn people about which food is safe to eat
B
develop a strategy to prevent future algal blooms
C
encourage people to go clean the affected area
D
evacuate all wildlife from the bay
8

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.
9

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
10

Which type of process occurred in the ecosystem that was affected by the 1988 fires in Yellowstone Park, which destroyed most of the vegetation but left the soil intact?

A
primary succession
B
secondary succession
C
a climax community
D
species extinction
11

A farmer has applied a pesticide to control a pest population that is affecting her crops. The pest population has reacted as shown below.Which best describes the process that the pest population has experienced due to this environmental change?

Question illustration
A
genetic diversity
B
natural selection
C
natural resistance
D
gene flow
12

Before the beginning of the Industrial Revolution, most peppered moths found in and around Manchester, England, exhibited light-colored wings speckled with black. After the Industrial Revolution, peppered moths with dark wings became predominant in the area.Which term best describes the change from more light-colored moths to more dark-colored moths?

Question illustration
A
competition
B
evolution
C
acquired
D
overpopulation
13

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
14

Kudzu is a vine that was brought to the United States from Japan to prevent erosion. Once here, kudzu became invasive. What role does kudzu most likely play in the environment in the United States?

A
Kudzu experiences loss due to overeating by livestock.
B
Kudzu is very susceptible to harsh winter conditions.
C
Kudzu outcompetes native plants for sunlight and nutrients.
D
Kudzu reproduces at a slow rate.
15

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
16

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.
17

When comparing dogs to wolves, scientists found evidence that supports the idea they come from a common ancestor. Which combination of evidence would most strongly support this idea?

A
comparable anatomies, fossils, and behavior
B
different anatomies, similar development, and different DNA
C
comparable anatomies, similar development, and similar DNA
D
different anatomies, fossils, and behavior
18

This diagram illustrates the three types of plant tissue.Which main plant tissue are the lines pointing to in the enlarged diagram?

Question illustration
A
dermal
B
ground
C
vascular
D
meristem
19

The lava released by a volcanic eruption separates two populations of a species of monkey. What does this represent?

A
biological isolation
B
geographical isolation
C
temporal isolation
D
anatomical isolation
20

A weakened immune system may be caused by

A
an overproduction of lysozymes.
B
muscle disorders.
C
immunodeficiency disorders.
D
complement systems in the blood.

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