| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.96 |
| Score | 0% | 59% |
Which of these does not contain oxygenated blood?
pulmonary vein |
|
right atrium |
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aorta |
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left ventricle |
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.
Which of the following is a decomposer?
pine tree |
|
fungi |
|
ferret |
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mosquito |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
Which of the following is not true about mass and weight?
weight depends on the location where it is measured |
|
mass depends on the location where it is measured |
|
mass is the amount of matter something has |
|
weight is the force exerted on an object by gravity |
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.
In the food chain, omnivores may be which of the following?
secondary consumers or scavengers |
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secondary or tertiary consumers |
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primary or tertiary consumers |
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primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.
Which of the following describes how a person's genes express themselves in physical characteristics?
chromotype |
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DNA |
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phenotype |
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genotype |
A person's genotype is their genetic makeup and includes both dominant and recessive alleles. Phenotype is how the genes express themselves in physical characteristics.