| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
Which of the following is true about species groups?
an ecosystem is a biological population |
|
a population is made up of a group of communities |
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a community is made up of a group of populations |
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a biome is a made up of a group of biospheres |
A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.
Which of the following is not a method of heat transfer?
radiation |
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convection |
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conduction |
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reflection |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
Which of the following states of matter exists at the highest temperature?
none of these |
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liquid |
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gas |
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solid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
In cell biology, where does DNA replication take place?
mitochondria |
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cytoplasm |
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nucleus |
|
Golgi apparatus |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
Earth's breathable air is held in which atmospheric layer?
troposphere |
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stratosphere |
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thermosphere |
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mesosphere |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.