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- 1. Multiple Choice
Which would most likely happen if all the soil in an ecosystem washed
away?
Most of the plants would die.
Most of the plants would grow in rocks.
All animals would become carnivores.
All animals and plants would relocate.
- 2. Multiple Choice
The number of fish in a lake suddenly increases. How will the increase MOST likely affect the lake?
There will be less water in the lake.
More plants will grow in the lake.
More frogs will live in the lake.
There will be fewer insects in the lake.
- 3. Multiple Choice
The diagram shows a food web in an ecosystem. The removal of which organism would result in the MOST damage to the ecosystem?
fox
rabbit
grasshopper
grass
- 4. Multiple Choice
An ecosystem is a community of organisms interacting with their physical environment. Why are decomposers an important part of ecosystems?
They break down dead organisms to return nutrients to the soil.
They produce their own food for survival.
They play a role in preventing weathering and erosion.
They provide most of the energy to consumers.
- 5. Multiple Choice
Meadow voles are small mouse-like animals that eat plants and insects. Their niche in an ecosystem is a
omnivore
herbivore
carnivore
scavenger
- 6. Multiple Choice
The following are inherited traits of humans EXCEPT
long hair
blue eyes
long eyelashes
dimples
- 7. Multiple Choice
A deer inherits some of its features from its parents. Other features come from its environment. Which feature would a deer MOST likely inherit from its parents?
a long scar
brown eyes
missing teeth
- 8. Multiple Choice
Which action does a kitten learn from its mother?
how to grow
how to meow
how to hunt mice
how to nurse milk
- 9. Multiple Choice
Which BEST describes ALL unicellular organisms?
every cell is round
every cell can make food
every cell can move on its own
every cell can perform its own functions
- 10. Multiple Choice
Which of these is a structure that is present in all organisms?
a tissue
a cell
a stomach
a brain
- 11. Multiple Choice
Which two human body systems are MOST responsible for getting oxygen to cells?
digestive and skeletal
skeletal and circulatory
circulatory and respiratory
respiratory and digestive
- 12. Multiple Choice
Plants in a forest need to obtain nutrients from the soil to survive. How do MOST of the nutrients get back in the soil once the forest plants have used them for growth?
Organic matter is recycled from dead organisms.
Commercial fertilizers are applied by humans.
Solar radiation reaches the ground surface.
Rainwater drips off of living organisms.
- 13. Multiple Choice
Which best describes the system that provides transportation for cell necessities using the bloodstream?
muscular system
circulatory system
respiratory system
cardiovascular system
- 14. Multiple Choice
Which best describes the purpose of the cardiovascular system?
It delivers blood to the body’s tissues.
it supplies stability to the skeleton.
It delivers food to power the body.
It supplies oxygen to the body.
- 15. Multiple Choice
Why is the respiratory system so important?
It controls breathing and gas exchange in the body.
It controls digestion and absorption of nutrients in the body.
It controls heartbeat and blood circulation throughout the body.
It controls internal body temperature and cools the body through sweat.
- 16. Multiple Choice
Which is a cardiovascular muscle?
lung
heart
stomach
diaphragm
- 17. Multiple Choice
How does the muscular system depend on the nervous system?
The nervous system transports blood to the muscles.
The nervous system provides support for the muscles.
The nervous system supplies food and oxygen to the muscles.
The nervous system sends signals to the muscles to cause movement.
- 18. Multiple Choice
A single-cell organism can do everything a cell from a multicellular organism can do EXCEPT
specialize.
reproduce.
use energy.
make protein.
- 19. Multiple Choice
Which is an example of a single-celled organism?
amoeba
insect
fish
- 20. Multiple Choice
Which statement BEST describes a learned characteristic in a dog?
A dog scratches at a door to go outside.
A dog has floppy ears.
A dog pants to cool itself on a hot day.
A dog has a dark coat.
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