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MCAS Review - Life Science
Test Description: Review questions for the MA State Comprehensive Assessment Test for STE.
Instructions: Answer all questions to get your test result.
1) While hiking, a student finds an unusual plant-like organism that appears to lack chlorophyll. When the student examines a sample, he sees many cells with cell walls and no chloroplasts. This organism is most likely a member of what Kingdom?
A
Fungi
B
Eubacteria
C
Animalia
D
Protista
2) Lightning from a thunderstorm strikes a 21 tree that falls to the forest floor and dies. During the next few years the dead tree undergoes many changes. What organisms are most likely responsible for the biological and chemical changes to the tree?
A
predators
B
producers
C
consumers
D
decomposers
3) The population of which of the following 26 organisms would most likely decline if small animals like rats, rabbits, and snakes were eliminated from an ecosystem?
A
grasses
B
earthworms
C
mushrooms
D
hawks
4) Which cellular organelle uses oxygen and glucose to provide energy to the cell?
A
nucleus
B
ribosome
C
mitochondrion
D
vacuole
5) The terms gas exchange, diaphragm, and inhale are most closely associated with which system in the human body?
A
digestive
B
circulatory
C
excretory
D
respiratory
6) What are the basic structural units of living organisms?
A
cells
B
nuclei
C
tissues
D
organelles
7) Students are studying the process of photosynthesis in plants. Which of the following is a product of photosynthesis?
A
sugar
B
carbon dioxide
C
nitrogen
D
sodium chloride
8) What do a caterpillar, mold and fern have in common?
A
They are disease-causing organisms.
B
They produce their own food.
C
They are made of cells.
D
They decompose other organisms.
9) Spirogyra are green algae that can reproduce sexually. Which of the following features identifi es reproduction in Spirogyra as sexual reproduction?
A
The cells of parent algae have nuclei.
B
Genetic material is contributed by two parent cells.
C
Each offspring contains chloroplasts.
D
Several offspring may be produced at once.
10) Which of the following groups of organisms uses sunlight to convert carbon dioxide and water into sugar and oxygen?
A
herbivores
B
producers
C
decomposers
D
carnivores
11) Which of the following best describes a role of mushrooms in ecosystems?
A
consuming living plant material
B
breaking down dead plant material
C
taking energy from animal hosts
D
capturing energy from sunlight
12) In the human body, which system functions primarily to defend the body against disease?
A
nervous
B
digestive
C
respiratory
D
immune
13) Lichens are symbiotic organisms made of green algae and fungi. What do the green algae supply to the fungi in this symbiotic relationship?
A
carbon dioxide
B
food
C
protection
D
water
14) If a new organism were discovered, which of the following would most likely be used to classify it into the appropriate kingdom?
A
the location where the organism was found
B
the structure of the organism’s anatomy
C
the organism’s natural habitat
D
the color of the organism
15) Which of the following structures is not present in animal cells?
A
mitochondrion
B
cell wall
C
nucleus
D
cell membrane
16) Which of the following best describes the purpose of the chromosomes in the nucleus of a cell?
A
to store the genetic instructions needed to specify traits
B
to release energy by breaking down food molecules
C
to transport nutrients into and out of the cell
D
to protect the cell from microorganisms
17) The complete removal of decomposers from an ecosystem will have the greatest effect on which of the following?
A
the spread of disease
B
the availability of water
C
the recycling of nutrients
D
the distribution of organisms
18) How is a skin cell from a mouse similar to an amoeba?
A
Both move with pseudopodia.
B
Both consume carbon dioxide.
C
Both need energy.
D
Both have cell walls.
19) Which of the following materials are direct products of photosynthesis?
A
carbon dioxide and water
B
oxygen and sugar
C
fats and starches
D
proteins and amino acids
20) Muscle cells need to quickly convert energy from food molecules into a usable form. For this reason, which of the following do muscle cells have in greater numbers than most other types of cells?
A
nuclei
B
mitochondria
C
vacuoles
D
chromosomes
*select an answer for all questions
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