MCAS Review - Life Science: Question Preview (ID: 19156)

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Which of the following materials are direct products of photosynthesis?
a) fats and starches
b) oxygen and sugar
c) proteins and amino acids
d) carbon dioxide and water

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) chromosomes
b) mitochondria
c) nuclei
d) vacuoles

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

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

How is a skin cell from a mouse similar to an amoeba?
a) Both need energy.
b) Both have cell walls.
c) Both move with pseudopodia.
d) Both consume carbon dioxide.

Which of the following structures is not present in animal cells?
a) cell membrane
b) cell wall
c) mitochondrion
d) nucleus

Which of the following best describes a role of mushrooms in ecosystems?
a) capturing energy from sunlight
b) consuming living plant material
c) taking energy from animal hosts
d) breaking down dead plant material

If a new organism were discovered, which of the following would most likely be used to classify it into the appropriate kingdom?
a) the color of the organism
b) the organism’s natural habitat
c) the structure of the organism’s anatomy
d) the location where the organism was found

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

In the human body, which system functions primarily to defend the body against disease?
a) digestive
b) immune
c) respiratory
d) nervous

What are the basic structural units of living organisms?
a) cells
b) nuclei
c) organelles
d) tissues

Students are studying the process of photosynthesis in plants. Which of the following is a product of photosynthesis?
a) carbon dioxide
b) nitrogen
c) sodium chloride
d) sugar

What do a caterpillar, mold and fern have in common?
a) They are made of cells.
b) They produce their own food.
c) They decompose other organisms.
d) They are disease-causing organisms.

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) Each offspring contains chloroplasts.
c) Several offspring may be produced at once.
d) Genetic material is contributed by two parent cells.

Which of the following groups of organisms uses sunlight to convert carbon dioxide and water into sugar and oxygen?
a) carnivores
b) decomposers
c) herbivores
d) producers

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) earthworms
b) grasses
c) hawks
d) mushrooms

The terms gas exchange, diaphragm, and inhale are most closely associated with which system in the human body?
a) circulatory
b) digestive
c) excretory
d) respiratory

Which cellular organelle uses oxygen and glucose to provide energy to the cell?
a) mitochondrion
b) nucleus
c) ribosome
d) vacuole

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) Eubacteria
b) Animalia
c) Fungi
d) Protista

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) consumers
b) decomposers
c) predators
d) producers

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