| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.86 |
| Score | 0% | 57% |
Which of the following describes the Earth's outer core?
makes up most of the Earth's volume |
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solid |
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liquid |
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primarily solid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
In fermentation, what replaces oxygen in anaerobic respiration?
lactic acid or alcohol |
|
ascorbic acid or peptides |
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starches |
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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.
Secondary consumers that also eat producers are known as:
carnivores |
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omnivores |
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herbivores |
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scavengers |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.
In the heart, the __________ artery and vein manage blood flow to the lungs.
capillary |
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atrial |
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aorta |
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pulmonary |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
DNA is encoded through a combination of which of the following?
genes |
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helix |
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gametes |
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nucleotides |
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.