| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.02 |
| Score | 0% | 60% |
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 is not a component of blood?
red blood cells |
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marrow |
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plasma |
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white blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
In cell biology, cytokinesis results in two separate:
cells |
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chromatids |
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chromosomes |
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nuclei |
During cell division, the cytokinesis phase occurs when cytoplasm and cell membranes complete their separation resulting in two separate cells.
Examples of primary consumers include:
cows |
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all of these |
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fish |
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rats |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
In the heart, blood flows from the right __________ to the lungs then back to the heart via the left __________.
ventricle, ventricle |
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atrium, ventricle |
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ventricle, atrium |
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atrium, atrium |
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.