| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.23 |
| Score | 0% | 65% |
In the food chain, omnivores may be which of the following?
primary or tertiary consumers |
|
secondary consumers or scavengers |
|
secondary or tertiary consumers |
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primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.
Stratus clouds are __________clouds characterized by horizontal layering with a broad flat base.
low-altitude |
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all-altitude |
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mid-altitude |
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high-altitude |
Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.
In fermentation, what replaces oxygen in anaerobic respiration?
ascorbic acid or peptides |
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lactic acid or alcohol |
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water |
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starches |
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.
When light travels between two substances it bends. This is called:
convection |
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conduction |
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refraction |
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reflection |
Because different materials have different refractive indices, light changes speed when passing from one material to another. This causes the light to bend (refraction) at an angle that depends on the change in refractive index between the materials. The greater the difference, the higher the angle of refraction.
Gametes have how many pairs of chromosomes?
4 |
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46 |
|
2 |
|
23 |
Reproductive (haploid) cells known as gametes have half as many (23) pairs of chromosomes as normal (diploid) cells. When the male gamete (sperm) combines with the female gamete (ovum) through meiosis to form a zygote, each gamete supplies half the chromosomes needed to form the normal diploid cells.