| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.76 |
| Score | 0% | 55% |
In cell biology, what part of the cell contains organelles?
cell wall |
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nucleus |
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cell membrane |
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cytoplasm |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
The Sun is a __________-type main-sequence star.
S |
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E |
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D |
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G |
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.
Which of the following is true about species groups?
a community is made up of a group of populations |
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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 |
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.
Examples of secondary consumers include:
wolves |
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plankton |
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grasshoppers |
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chickens |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.
The transfer of heat by the circulation or movement of the heated parts of a liquid or gas is called:
radiation |
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convection |
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conduction |
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diffusion |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas. Examples of heat transfer by convection include water coming to a boil on a stove, ice melting, and steam from a cup of coffee.