| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.77 |
| Score | 0% | 75% |
Which of the following is true about species groups?
an ecosystem is a biological population |
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a biome is a made up of a group of biospheres |
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a population is made up of a group of communities |
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a community is made up of a group of populations |
A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.
The number system most used in science is the:
metric system |
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American system |
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British system |
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English system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.
Which of blood component allows blood to clot?
red blood cells |
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plasma |
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white blood cells |
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platelets |
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.
__________ is caused by a lack of iron in the diet.
diabetes |
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anemia |
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scurvy |
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shingles |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
A person's genotype is their genetic makeup and includes:
dominant alleles |
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both dominant and recessive alleles |
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recessive alleles |
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phenotypes |
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.