| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.36 |
| Score | 0% | 67% |
Within DNA, a variety of a particular gene is called a(n):
heterozygous |
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chromosome |
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homozygous |
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allele |
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.
Which of these does not contain oxygenated blood?
left ventricle |
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aorta |
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pulmonary vein |
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right atrium |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
Momentum is a measure of how difficult it is for a moving object to stop. Which of the following is the formula for momentum?
none of these |
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\(\vec{p} = {m \over \vec{v}}\) |
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\(\vec{p} = m\vec{v}\) |
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\(\vec{p} = { \vec{v} \over m}\) |
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.
Leafy vegetables, beans, potatoes, fruits, and whole grains are good sources of:
unsaturated fat |
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protein |
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saturated fat |
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fiber |
Fiber provides bulk to help the large intestine carry away waste. Good sources of fiber are leafy vegetables, beans, potatoes, fruits, and whole grains.
The heat from the Sun traveling to Earth is an example of which of the following?
conduction |
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convection |
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electricity |
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radiation |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.