| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.78 |
| Score | 0% | 56% |
Which of the following describes how a person's genes express themselves in physical characteristics?
phenotype |
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DNA |
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chromotype |
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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.
Secondary consumers that also eat producers are known as:
omnivores |
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scavengers |
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herbivores |
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carnivores |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.
The Sun is a __________-type main-sequence star.
D |
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S |
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G |
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E |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.
In the food chain, omnivores may be which of the following?
primary or secondary consumers |
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primary or tertiary consumers |
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secondary consumers or scavengers |
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secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
Which of the following is true about species groups?
an ecosystem is a biological population |
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a population is made up of a group of communities |
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a biome is a made up of a group of biospheres |
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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.