Term
| What are the 4 characteristics of living things? |
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Definition
Organization
Growth
Reproduction
Response |
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Term
What are animals made of?
What can they do? |
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Definition
Animals are made up of cells--tissues--organs-- systems.
They change size, they make offspring, they respond to changes in temperature. |
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Term
| What materials are necessary for life to exchange with the environment? |
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Definition
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Term
What is a virus?
Why are they not considered living? |
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Definition
It is a small collection of genetic material enclosed in a protein shell.
They are not considered living because they donor grow or respond to their environment.
They need a host to replicate themselves. |
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Term
What is bacteria?
How do they reproduce? |
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Definition
They are the simplest form of life, composed of one cell. They are smaller than typical cells and do not have a nucleus.
They reproduce through binary fission, one cell dividing into two. |
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Term
| How do scientists classify bacteria's external shape? |
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Definition
Spiral-single strands
Rod-strands or chains
Round-chains or clusters |
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Term
| What are Archaea? Describe 3 groups. |
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Definition
They are a group of organisms that survive in the large range environments.
1.methanogens- produce methane gas, live in mud, swamps and guts of animals
2.Halophiles-live in salty lakes
3. Thermophiles-live in extreme temperatures |
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Term
| What are the 3 roles bacteria play in the environment? |
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Definition
Producers-transform energy from sunlight that can
be used by the cell.
Decomposers- chemical breakdown and recycle materials from dead plants and animals.
Parasites-an organism that lives in a close relationship with another organism. |
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Term
| Why are bacteria helpful? |
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Definition
They can break down matter and changes terminals that do not come from living things and make them available for other organisms.
--they can change nitrogen gases into nitrogen compounds, used by plants to grow. |
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Term
| What are 3 ways bacteria can cause the symptoms of disease? |
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Definition
1. --invade parts of the body, multiplying in body tissues/ dissolving cells.
2.--poison the body with chemicals they produce and release.
3.--poison the body with chemicals that are part of bacteria. |
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Term
| What is one way to fight bacteria disease? Why? |
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Definition
| With vaccinations, you help individuals prepare to fight diseases they may encounter in the future. |
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Term
| Why does a cell affect a living thing? |
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Definition
| It affects a living thing to replicate itself so that it can make copies called host cells. |
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Term
| What are the 5 steps needed for a new virus to form? |
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Definition
Attachment
Injection
Production
Assembly
Release
--1st: the virus attaches to the surface of a bacterium
2nd: the virus injects its DNA into the bacterium.
3rd: the virus produce copies of its own DNA in the host cell.
4th: the virus DNA is assembled into new viruses.
5th: the host cell bursts open releasing new viruses. |
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