AnswersDCSS Biology CR 24-25Cumulative Exam

Cumulative Exam — Cumulative exam Answers

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Some animals shiver as a natural, involuntary response to their environment. Shivering generates heat. This is an example of which function?

A
reducing movement to regulate body temperature
B
reducing movement to regulate blood glucose
C
maintaining homeostasis by regulating body temperature
D
maintaining homeostasis by regulating blood glucose
23
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Which are produced as a result of meiosis?

A
zygotes
B
chromosomes
C
tetrads
D
gametes
24

Male peacocks have large colorful tails that they spread in a fan shape to attract females during courtship. Peahens (female peacocks) are more likely to mate with males that have larger and more colorful tails. As a result, few peacocks have tails with dull coloring.Which concept is demonstrated by a decrease in dull coloring?

Question illustration
A
speciation
B
biodiversity
C
natural selection
D
variation
25

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
26

Katie wants to make ball-and-stick models of the four macromolecules. She has colored balls for each of the elements in these molecules, including the following. red: hydrogen black: carbon purple: oxygen green: nitrogenIn which macromolecule will she use the black, red, and purple balls in a ratio of 1:2:1?

A
carbohydrates
B
lipids
C
nucleic acids
D
proteins
27

For which form of reproduction is a mate required?

A
asexual reproduction
B
sexual reproduction
C
mitosis
D
binary fission
28

A biologist counts the number of zebras in a population each year, and notices an increase in the zebra population. Which describes the biologist’s actions?

A
graphing
B
inference
C
observation
D
interacting
29

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
30

How does the cell wall protect a plant cell?

A
The cell wall protects the cell by providing support and maintaining the cell's shape.
B
The cell wall protects the cell by storing food so the plant doesn't run out.
C
The cell wall is thin and flexible, which allows the cell to be moved without harming the organelles.
D
The cell wall is on the inside of the cell and serves to contain the contents of the cell.
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

During which stage of cellular respiration is glucose broken down into two molecules of pyruvic acid?

A
electron transport chain
B
glycolysis
C
Krebs cycle
D
acetyl CoA formation
33

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.
34

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.
35

Sophie says dolphins and sharks look very similar, so they must be related. Jake disagrees, saying DNA evidence has shown that dolphins and other aquatic mammals are actually more closely related to the ancestors of modern hippos. Who is correct using the modern system of classification?

A
Sophie is correct because dolphins look more like sharks than like hippos.
B
Jake is correct because classification is based on evolutionary relationships.
C
Both are correct because traditional and modern classifications can overlap.
D
Neither is correct because neither is taking into account both the traditional and modern systems
36

The chemical equation of photosynthesis includes 6O2. Which best describes this substance?

A
a solid used during photosynthesis
B
a gas used during photosynthesis
C
a liquid produced during photosynthesis
D
a gas produced during photosynthesis
37

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
38

A microgram of skin cells.

Question illustration
A
cell
B
tissue
C
organ
D
organ system
39

Mitosis is important because it allows

A
new cells to replace old damaged cells.
B
new cells to repair old damaged cells.
C
old cells to self-repair when they become damaged.
D
existing cells to take over the function of damaged cells.
40

During which process is ethanol produced?

A
lactic acid fermentation
B
alcohol fermentation
C
citric acid cycle
D
electron transport chain
41

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

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