| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.85 |
| Score | 0% | 57% |
Which of the following is not true about mass and weight?
weight is the force exerted on an object by gravity |
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mass is the amount of matter something has |
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mass depends on the location where it is measured |
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weight depends on the location where it is measured |
Mass is the amount of matter something has while weight is the force exerted on an object's mass by gravity. So, although a person's mass doesn't change when going from the Earth to the Moon, their weight will decrease because the force of the Moon's gravity is much less than that of Earth.
A large naturally occurring community of flora and fauna occupying a major habitat is:
a food chain |
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a population |
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a biome |
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a community |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
DNA is encoded through a combination of which of the following?
nucleotides |
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helix |
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gametes |
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genes |
Deoxyribonucleic acid (DNA) is the molecule that contains genetic information. DNA is encoded through a combination of nucleotides that bind together in a specific double helix pattern.
In fermentation, what replaces oxygen in anaerobic respiration?
lactic acid or alcohol |
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starches |
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ascorbic acid or peptides |
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water |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
Which of the following is true about species groups?
a community is made up of a group of populations |
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an ecosystem is a biological population |
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a population is made up of a group of communities |
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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.