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Life Science MCAS review Flashcards | StudBud
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Life Science MCAS review
Life Science MCAS review
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8th grade mcas review questions.
Flashcards
44 cards
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Practice quiz
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Questions
44
Answers
1
Which of these numbered drawings represents a tissue?
3
2
4
1
2
look at your packet...what is the answer for number 25? (pictures did not upload!)
B
A
D
C
3
Which of the following best describes a role of mushrooms in ecosystems?
B. consuming living plant material
D. breaking down dead plant material
C. taking energy from animal hosts
A. capturing energy from sunlight
4
Which of the following best explains why the beak shape of each bird developed differently?
B. an adaptation to a specific source of food.
A. to produce different songs.
D. helps protect the birds from a different predator.
C. designed to construct a different type of nest.
5
Some bacteria can only live where oxygen is not present.What caused many to become extinct?
D. Increase in photosynthetic organisms
C. an increase in volcanic activity under oceans
B. the varying temperatures of each season
A. the slow movement of tectonic plates
6
If all the trees were cut down, which population would be most directly affected?
B. grasshopper
D. rabbit
C. oriole
A. aphid
7
Most bacteria are best classified as which of the following types of organisms?
D. producers
A. consumers
C. predators
B. decomposers
8
What is the correct answer for 26?
B
A
C
D
9
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
10
which would most likely be used to classify an organism into the appropriate kingdom?
A. the color of the organism
B. the organism’s natural habitat
D. the location where the organism was found
C. the structure of the organism’s anatomy
11
The female offspring of the fruit flies will receive which pair of chromosomes?Use your packet
A
B
D
C
12
Which will cause the next gen.cows to receive the trait for producing large quantities of milk?
A. nutrients in the cows’ food
D. information in the cows’ chromosomes
C. electrical impulses in the cows’ brains
B. essential minerals in the cows’ water
13
The organism Anya is observing most likely belongs to which kingdom?
C. Fungi
D. Plantae
A. Animalia
B. Eubacteria
14
Here are two protists, What do these two organisms have in common?
D. They are photosynthetic.
B. They cause diseases.
C. They live underground.
A. They are unicellular.
15
BONUS: What is the visual representation of an organim's chromosomes?
genotype
phenotype
prototype
karyotype
16
Which group of organisms uses sunlight to change carbon dioxide and water into sugar and oxygen
D. producers
A. carnivores
B. decomposers
C. herbivores
17
Which of the following statements best explains why some of the offspring have white flowers?
inherited coding for white flowers from one parent plant
B. They were produced in a dark environment.
C. inherited coding for white flowers from each parent
A. offspring were created by asexual reproduction.
18
Comparing the skeletons of which fish would best show the evolution of a fish species?
B.the same fish just before it received a cut and healed
C. a fish that lived recently and a fish that lived long ago
A. a male and female fish that produce offspring
D.the same fish after it hatched and when it was full-grown
19
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.
20
The removal of decomposers from an ecosystem will have the greatest effect on which of these?
B. the availability of water
D. the distribution of organisms
C. the recycling of nutrients
A. the spread of disease
21
Which of the following best describes the purpose of the chromosomes in the nucleus of a cell?
B. to release energy by breaking down food
D. to protect the cells from microorganisms
A. to store the genes that specify traits
C. to transport nutrients into and out of the cell
22
Which of the following best describes the number of chromosomes in a normal human liver cell?
D. 23 original chromosomes and 23 duplicates
B. 46 different types of chromosomes
A. 23 pairs of chromosomes
C. 46 male chromosomes and 46 female chromosomes
23
Human activity most likely contributes to which of the following changes on Earth?
D.an increase in the amount of atmospheric carbon dioxide
A. an increase in the length of a day
B. a decrease in the number of volcanic eruptions
C. a decrease in the magnitude of large earthquakes
24
Which of the following materials are direct products of photosynthesis?
D. carbon dioxide and water
B. oxygen and sugar
C. proteins and amino acids
A. fats and starches
25
Which of the following organisms produces energy from sunlight?
A. worm
D. grass
B. rabbit
C. hawk
26
Substances enter any plant or animal cell by passing through which of the following structures?
C. vacuole
B. cell membrane
A. nucleus
D. chloroplast
27
Which of the following statements best describes photosynthesis?
B. Sugar/oxygen are turned into water and carbon dioxide
D.Water and sugar are turned into oxygen and carbon dioxide.
C. Oxygen / carbon dioxide are turned into water and sugar.
A.Carbon dioxide and water are turned into sugar and oxygen.
28
How is a skin cell from a mouse similar to an amoeba
D. Both consume carbon dioxide.
A. Both need energy.
B. Both have cell walls.
C. Both move with pseudopodia.
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
Ffound in aquatic environments, which of the following is common to both of these organisms?
B. They contain nerves.
D. They are both composed of cells.
C. They are both producers of food.
A. They contain blood.
31
In the human body, which system functions primarily to defend the body against disease?
C. nervous
B. immune
A. digestive
D. respiratory
32
Which body system typically recognizes, attacks, and destroys foreign cells or disease?
A. digestive
D. respiratory
C. immune
B. excretory
33
Symbiotic relationship: What do the green algae supply to the fungi?
D. water
B. food
C. Protection
A. carbon dioxide
34
Which part of a plant cell has a function most similar to the function of an animal skeleton?
C. Chloroplast
A. Cell membrane
B. Cell wall
D. nucleus
35
In which kingdom is the paramecium classified?
<div>B. Fungi</div>
A. Animalia
D. Protist
C. Plantae
36
BONUS: What chromosome pair represents the human male gender?
ZZ
XX
YY
XY
37
Which of the following parts of the human body is most complex?
B. kidney
C. white blood cell
A. heart
D. central nervous system
38
Based on the diagram, which of the following statements is true?
D. Gorillas and baboons evolved from a common ancestor.
C. Spider monkeys and lemurs evolved at the same time.
B. Gorillas evolved directly from chimpanzees.
A. Lemurs were the most recent to evolve.
39
Which cellular structure is present in both animal and plant cells, and makes energy available.
A. cell wall
B. chloroplast
D. nucleus
C. mitochondrion
40
Muscle cells need lots of energy. Which of the following do they need more of than other cells?
B. mitochondria
D. vacuoles
A. chromosomes
C. nuclei
41
The instructions that determine coat color are stored in the
D. chromosomes of every cell.
C. mitochondria of hair cells.
B. membrane of every cell.
A. cytoplasm of skin cells.
42
Which of the following structures is not present in animal cells?
C. mitochondrion
B. cell wall
A. cell membrane
D. nucleus
43
Which of the following best describes the function of this system?
B. protecting the body from infection
C. exchanging gases with the environment
D. responding to stimuli in the environment
A. absorbing nutrients from food
44
Which is the primary advantage of sexual reproduction when compared to asexual reproduction?
A. There is a greater number of offspring.
B. There is more food available to offspring.
C. There is greater genetic variety in offspring.
D. There is a longer development time for offspring.
