Which of the following best explains why the beak shape of each bird developed differently?

B. an adaptation to a specific source of food.

Based on the diagram, which of the following statements is true?

D. Gorillas and baboons evolved from a common ancestor.

Which of the following best describes the function of this system?

C. exchanging gases with the environment

Human activity most likely contributes to which of the following changes on Earth?

D.an increase in the amount of atmospheric carbon dioxide

Found in aquatic environments, which of the following is common to both of these organisms?

D. They are both composed of cells.

Some bacteria can only live where oxygen is not present.What caused many to become extinct?

D. Increase in photosynthetic organisms

Which of the following has changed over the last 200 years primarily due to human activity?

D. the composition of the atmosphere

Which of the following statements best explains why some of the offspring have white flowers?

C. inherited coding for white flowers from each parent

Comparing the skeletons of which fish would best show the evolution of a fish species?

C. a fish that lived recently and a fish that lived long ago

Which of the following statements is supported by the similarities between these embryos?

D. The chicken and the turtle share a common ancestor.

Which of the following best describes a role of mushrooms in ecosystems?

D. breaking down dead plant material

Which is the primary advantage of sexual reproduction when compared to asexual reproduction?

C. There is greater genetic variety in offspring.

which would most likely be used to classify an organism into the appropriate kingdom?

C. the structure of the organism’s anatomy

Which best supports the conclusion that two animal species evolved from a common ancestor?

B. The species have similar bone structure.

Which of the following statements best describes photosynthesis?

A.Carbon dioxide and water are turned into sugar and oxygen.

Which will cause the next gen.cows to receive the trait for producing large quantities of milk?

D. information in the cows’ chromosomes

Which of the following best describes the purpose of the chromosomes in the nucleus of a cell?

A. to store the genes that specify traits

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8th grade mcas review questions. #science

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Questions 42

Answers

1
The removal of decomposers from an ecosystem will have the greatest effect on which of these?
C. the recycling of nutrients
B. the availability of water
D. the distribution of organisms
A. the spread of disease
2
Substances enter any plant or animal cell by passing through which of the following structures?
A. nucleus
B. cell membrane
D. chloroplast
C. vacuole
3
Which of the following best explains why the beak shape of each bird developed differently?
C. designed to construct a different type of nest.
A. to produce different songs.
B. an adaptation to a specific source of food.
D. helps protect the birds from a different predator.
4
Most bacteria are best classified as which of the following types of organisms?
B. decomposers
D. producers
A. consumers
C. predators
5
Based on the diagram, which of the following statements is true?
D. Gorillas and baboons evolved from a common ancestor.
A. Lemurs were the most recent to evolve.
B. Gorillas evolved directly from chimpanzees.
C. Spider monkeys and lemurs evolved at the same time.
6
The instructions that determine coat color are stored in the
C. mitochondria of hair cells.
A. cytoplasm of skin cells.
D. chromosomes of every cell.
B. membrane of every cell.
7
Which of the following best describes the function of this system?
C. exchanging gases with the environment
B. protecting the body from infection
D. responding to stimuli in the environment
A. absorbing nutrients from food
8
The organism Anya is observing most likely belongs to which kingdom?
C. Fungi
A. Animalia
B. Eubacteria
D. Plantae
9
The female offspring of the fruit flies will receive which pair of chromosomes?Use your packet
C
D
B
A
10
Human activity most likely contributes to which of the following changes on Earth?
D.an increase in the amount of atmospheric carbon dioxide
B. a decrease in the number of volcanic eruptions
C. a decrease in the magnitude of large earthquakes
A. an increase in the length of a day
11
Muscle cells need lots of energy. Which of the following do they need more of than other cells?
D. vacuoles
C. nuclei
B. mitochondria
A. chromosomes
12
Which of the following structures is not present in animal cells?
D. nucleus
B. cell wall
A. cell membrane
C. mitochondrion
13
BONUS: What chromosome pair represents the human male gender?
XY
ZZ
YY
XX
14
Here are two protists, What do these two organisms have in common?
B. They cause diseases.
A. They are unicellular.
D. They are photosynthetic.
C. They live underground.
15
Found in aquatic environments, which of the following is common to both of these organisms?
A. They contain blood.
B. They contain nerves.
D. They are both composed of cells.
C. They are both producers of food.
16
If all the trees were cut down, which population would be most directly affected?
B. grasshopper
D. rabbit
A. aphid
C. oriole
17
Which of the following parts of the human body is most complex?
A. heart
B. kidney
D. central nervous system
C. white blood cell
18
How is a skin cell from a mouse similar to an amoeba
D. Both consume carbon dioxide.
A. Both need energy.
C. Both move with pseudopodia.
B. Both have cell walls.
19
Some bacteria can only live where oxygen is not present.What caused many to become extinct?
C. an increase in volcanic activity under oceans
A. the slow movement of tectonic plates
B. the varying temperatures of each season
D. Increase in photosynthetic organisms
20
Which of the following has changed over the last 200 years primarily due to human activity?
B. the frequency of earthquakes
D. the composition of the atmosphere
A. Earth’s magnetic field
C. Earth’s tectonic plate activity
21
In the human body, which system functions primarily to defend the body against disease?
B. immune
C. nervous
A. digestive
D. respiratory
22
Which of these numbered drawings represents a tissue?
4
1
2
3
23
Which cellular structure is present in both animal and plant cells, and makes energy available.
D. nucleus
A. cell wall
C. mitochondrion
B. chloroplast
24
Which of the following statements best explains why some of the offspring have white flowers?
B. They were produced in a dark environment.
inherited coding for white flowers from one parent plant
A. offspring were created by asexual reproduction.
C. inherited coding for white flowers from each parent
25
Which of the following organisms produces energy from sunlight?
B. rabbit
D. grass
A. worm
C. hawk
26
Comparing the skeletons of which fish would best show the evolution of a fish species?
D.the same fish after it hatched and when it was full-grown
A. a male and female fish that produce offspring
C. a fish that lived recently and a fish that lived long ago
B.the same fish just before it received a cut and healed
27
Which group of organisms uses sunlight to change carbon dioxide and water into sugar and oxygen
A. carnivores
D. producers
B. decomposers
C. herbivores
28
Which of the following materials are direct products of photosynthesis?
D. carbon dioxide and water
C. proteins and amino acids
B. oxygen and sugar
A. fats and starches
29
Which of the following statements is supported by the similarities between these embryos?
B. The chicken has more offspring than the turtle.
C. The turtle and the chicken are similar as adults.
D. The chicken and the turtle share a common ancestor.
A. The turtle is more advanced than the chicken.
30
Which of the following best describes a role of mushrooms in ecosystems?
D. breaking down dead plant material
A. capturing energy from sunlight
C. taking energy from animal hosts
B. consuming living plant material
31
Which is the primary advantage of sexual reproduction when compared to asexual reproduction?
D. There is a longer development time for offspring.
C. There is greater genetic variety in offspring.
B. There is more food available to offspring.
A. There is a greater number of offspring.
32
Which body system typically recognizes, attacks, and destroys foreign cells or disease?
A. digestive
B. excretory
C. immune
D. respiratory
33
which would most likely be used to classify an organism into the appropriate kingdom?
D. the location where the organism was found
C. the structure of the organism’s anatomy
A. the color of the organism
B. the organism’s natural habitat
34
BONUS: What is the visual representation of an organim's chromosomes?
karyotype
prototype
genotype
phenotype
35
Which best supports the conclusion that two animal species evolved from a common ancestor?
C. The species live in the same environment.
A. The species are both herbivores.
D. The species both obtain oxygen from the air.
B. The species have similar bone structure.
36
Which of the following best describes the number of chromosomes in a normal human liver cell?
C. 46 male chromosomes and 46 female chromosomes
D. 23 original chromosomes and 23 duplicates
B. 46 different types of chromosomes
A. 23 pairs of chromosomes
37
Symbiotic relationship: What do the green algae supply to the fungi?
C. Protection
D. water
A. carbon dioxide
B. food
38
Which part of a plant cell has a function most similar to the function of an animal skeleton?
C. Chloroplast
A. Cell membrane
D. nucleus
B. Cell wall
39
Which of the following statements best describes photosynthesis?
B. Sugar/oxygen are turned into water and carbon dioxide
A.Carbon dioxide and water are turned into sugar and oxygen.
D.Water and sugar are turned into oxygen and carbon dioxide.
C. Oxygen / carbon dioxide are turned into water and sugar.
40
In which kingdom is the paramecium classified?
D. Protist
B. Fungi
A. Animalia
C. Plantae
41
Which will cause the next gen.cows to receive the trait for producing large quantities of milk?
C. electrical impulses in the cows’ brains
A. nutrients in the cows’ food
B. essential minerals in the cows’ water
D. information in the cows’ chromosomes
42
Which of the following best describes the purpose of the chromosomes in the nucleus of a cell?
C. to transport nutrients into and out of the cell
B. to release energy by breaking down food
A. to store the genes that specify traits
D. to protect the cells from microorganisms

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