| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.63 |
| Score | 0% | 73% |
Plant cells are surrounded by:
only a cell wall |
|
only a cell membrane |
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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 food chain serves only as food for other organisms?
decomposers |
|
primary consumers |
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producers |
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secondary consumers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis
Which of the following is the smallest component of an element that still retains the properties of the element?
molecule |
|
element |
|
atom |
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neutron |
An atom is the smallest component of an element that still retains the properties of the element.
The brain and spinal cord make up the __________ nervous system.
autonomic |
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peripheral |
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central |
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somatic |
The nervous system consists of the brain and spinal cord (central nervous system) and the peripheral nervous system which is the network of nerve cells (neurons) that collect and distribute signals from the central nervous system throughout the body.
Convert 0C° to F°.
0 |
|
32 |
|
16 |
|
-32 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)