AnswersLA-Biology B-CRTopic Test

Topic Test — Cumulative exam Answers

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1
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An object can fossilize if it is buried slowly and has hard parts. Please select the best answer from the choices provided

A
T
B
F
2
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Half-life can be used to calculate the age of a rock if the amount of the isotope in the rock is known.

A
T
B
F
3

Superposition is used to assign relative ages to rock layers, the newer layers on the bottom and the oldest layers on the top.

A
T
B
F
4

Which describes the function of the human sperm cell’s structure?

A
The nucleus contains all 46 chromosomes.
B
The tail allows it to travel to the egg.
C
The head contains a basic substance that counteracts acidic substances in the vagina.
D
The sperm’s structure allows it to live for two weeks in the vagina.
5

The Heimlich maneuver is a series of pushing motions on the area just under the diaphragm that helps a person whose airway is blocked. Which best explains how this maneuver helps unblock a person's airway?

A
Pushing the diaphragm causes air to flow out of the lungs, which pushes the blockage out.
B
Pushing the diaphragm causes blood to rush to the area that pushes the blockage out.
C
Pushing the diaphragm allows the brain to produce hormones that push the blockage out.
D
Pushing the diaphragm causes a person's ribs to contract, which pushes the blockage out.
6

The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer time periods. What is this an example of?

A
directional selection
B
disruptive selection
C
ecosystem selection
D
stabilizing selection
7

In order to assemble the organic compounds that are necessary for life, enzymes must break down food into their building blocks. What would happen if someone was not able to produce enough amylase?

A
Simple sugars would not be obtained from carbohydrates.
B
Amino acids would not be obtained from proteins.
C
Fatty acids would not be obtained from lipids.
D
Nucleotides would not be obtained from nucleic acids.
8

Medical biologists are researching a fertility disorder that prevents developing offspring from forming the structures they need to maintain nourishment and continue development. Therefore, development ceases early during gestation. What is the final stage of development that these offspring could reach before development stops?

A
zygote
B
blastocyst
C
fetus
D
gametes
9

Samuel ate some vegetable soup. What process is at work to allow Samuel to break down the soup so that his body will be able to produce energy?

A
growth
B
absorption
C
excretion
D
digestion
10

These statements compare and contrast Ascomycota and Basidiomycota.I. Some species in both groups can cause plant diseases.II. Species from both groups can be used in making bread rise.III. All species in both groups can be used as food.IV. Ascomycota produce spores in a sac-like structure; Basidiomycota produce spores in a club-shaped structure. Which of the statements are true?

A
II and III
B
III and IV
C
I and IV
D
II and IV
11

What is the name of the process that develops reproductive cells in males?

A
oogenesis
B
spermatogenesis
C
fertilization
D
polarization
12

Why is blood clotting important?

A
It helps to heal cuts.
B
It helps the blood circulate.
C
It helps attack foreign materials.
D
It helps to pump blood.
13

There are four steps in bacterial conjugation. The second step is missing in this list.1. Special sex pilus connects two cells.2.3. Each cell makes a complementary DNA strand.4. The cells separate.Which is the missing step for the process of conjugation described?

A
Two new, identical cells are produced.
B
The cell membrane elongates and pinches off.
C
Some DNA moves from one cell to another.
D
A DNA molecule attaches to the cell membrane.
14

Both the spleen and the lymph nodes aid in protecting the body. In what way do they differ?

A
The spleen filters blood, and lymph nodes filter lymph.
B
The spleen is an organ, and lymph nodes are a type of tissue.
C
The spleen stores blood, and lymph nodes store fat.
D
The spleen breaks down white blood cells, and lymph nodes breaks down red blood cells.
15

A student argues that two species of birds are the same species because they have similar body structures, similar DNA, and similar beaks. Another student argues that the birds are different species because they have different color patterns and have a different mating season. Which piece of evidence supports the second student's argument?

A
The birds have similar body structure.
B
The birds have similar beaks.
C
The birds have different color variations.
D
The birds have different mating seasons.
16

Which is the correct written form of the scientific name that uses the rules of binomial nomenclature?

A
Felis domesticus
B
Felis Domesticus
C
Felis domesticus
D
felis domesticus
17

A founding population of lizards arrives on an island. Which type of isolation would most likely result in this population becoming a new species?

A
temporal
B
geographical
C
anatomical
D
behavioral
18

Consider the diagram of the basic structure of bacteria.Which of the labeled structures in the diagram allows bacteria to infect organisms under harsh conditions, such as in the acidic stomach?

Question illustration
A
A
B
B
C
C
D
D
19

Which best describes the different modes of bacterial reproduction?

A
In genetic recombination, two new genetically identical cells are produced.
B
In conjugation, a special sex pilus is required to connect two bacterial cells.
C
In transduction, a bacterium exchanges a piece of its own DNA with another from the environment.
D
In transformation, bacterial DNA is transferred from one bacterium to another by a replicating virus.
20

Which kingdom(s) include both unicellular and multicellular organisms?

A
Plantae and Archaebacteria
B
Fungi
C
Eubacteria
D
Animalia and Plantae

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