| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
circulation |
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respiration |
|
nervous |
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digestion |
The trachea branches into the left and right bronchi which each lead to a lung where the bronchi subdivide into smaller tubes called bronchioles. Each bronchiole ends in a small sac called an alveolus which allows oxygen from the air to enter the bloodstream via tiny blood vessels called capillaries.
Within DNA, a variety of a particular gene is called a(n):
homozygous |
|
allele |
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heterozygous |
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chromosome |
The gene is the base unit of inheritance and is contained within DNA. A gene may come in several varieties (alleles) and there are a pair of alleles for every gene. If the alleles are alike, a person is homozygous for that gene. If the alleles are different, heterozygous.
As part of digestion, the liver produces bile which breaks down:
sugars |
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protein |
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fat |
|
starches |
The liver produces bile which emulsifies (separates) fat.
In the food chain, consumers are classified as which of the following?
tertiary |
|
all of these |
|
secondary |
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primary |
Most animals consume other organisms to survive. Consumers (heterotrophs) are divided into three types, primary, secondary, and tertiary, based on their place in the food chain.
Momentum is a measure of how difficult it is for a moving object to stop. Which of the following is the formula for momentum?
\(\vec{p} = {m \over \vec{v}}\) |
|
\(\vec{p} = { \vec{v} \over m}\) |
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\(\vec{p} = m\vec{v}\) |
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none of these |
Momentum is a measure of how difficult it is for a moving object to stop and is calculated by multiplying the object's mass by its velocity: \(\vec{p} = m\vec{v}\). Like velocity, momentum is a vector quantity as it expresses force applied in a specific direction.