| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
Plant cells are surrounded by:
only a cell membrane |
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only a cell wall |
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a cell membrane and a cell wall |
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neither a cell membrane nor a cell wall |
Animal cells are surrounded by a semipermeable membrane which allows for the transfer of water and oxygen to and from the cell. In plant cells, the cell membrane is surrounded by a somewhat rigid cell wall which provides the cell structure and support.
What part of the brain is responsible for for balance, movement, and muscle coordination?
cerebellum |
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brainstem |
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medulla |
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cerebrum |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
In the food chain, omnivores may be which of the following?
secondary consumers or scavengers |
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primary or secondary consumers |
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secondary or tertiary consumers |
|
primary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
Which of the following is a decomposer?
fungi |
|
pine tree |
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ferret |
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mosquito |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
Scavengers break down the dead bodies of plants and animals into which of the following?
simple nutrients |
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complex carbohydrates |
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carrion |
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producers |
Like decomposers, scavengers also break down the dead bodies of plants and animals into simple nutrients. The difference is that scavengers operate on much larger refuse and dead animals (carrion). Decomposers then consume the much smaller particles left over by the scavengers.