Life science ch 7
What are some environmental conditions that make it difficult for bacteria to survive?
-Intense heat -cold -drought
Describe three ways is some bacteria move around to find resources.
-some use a flagella -some twist -some use a pili
In which three ways do bacteria obtain food?
1. Take in nutrients from living hosts. 2. Take in food and break it down and then obtain energy. 3. Feed on dead organisms or organic waste.
What are prokaryotes?
A prokaryote is a unicellular organism that does not have a nucleus or other membrane - bound organelles.
What is the role of some bacteria and nitrogen fixation?
Bacteria in the nucleus convert nitrogen from the atmosphere into a form assessable by plants.
Explain what causes the symptoms of viral diseases.
Because when your immune system cannot fight back
Bacteria generally have one of two basic shapes to determine how they are named.
False 3
A nucleus, DNA, a cell membrane, and a cell wall make up a typical bacterium. T/F
False Cytoplasm
A small circular piece of cytoplasm is a plasmid.
False DNA
Conjugation is a way back to your reproduce asexually
False Fission
Fission is cell division that forms to genetically different cells. T/F
False Identical
To bacteria of the same species attached to each other and combine their genetic material during fission.
False Conjugation
Explain why virus cannot affect every cell.
Is only able to connect to a hoe so with specific molecules on his cell wall or cell membrane.
What is nitrogen fixation?
Is the conversion of atmospheric nitrogen into nitrogen compounds that are usable by living things.
What is an antiviral medicine, and what are its limitations?
It can be used for specific diseases. Viruses can change and become resistant to medicine.
What is decomposition?
It is the breaking down of dead organisms and organic waste.
How does in an Endospore allow a bacterium to survive?
It keeps bacterium from drying out and it keeps white blood cells from surrounding it.
What are two ways to avoid getting a viral disease, such as the common cold.
Limit contact with infected person, and washer hands.
Why is nitrogen fixation important?
Living things use nitrogen compounds made by nitrogen fixation.
How is decomposition important for the life process of living organisms that are not decomposers?
Other plants use decompose plants to live.
How is decomposition important for the survival of some bacteria?
Some bacteria feed off of dead organisms.
What do you some bacteria do to survive an unfavorable environmental conditions?
Some will form endospores.
What might the environment look like a decomposition did not Occur?
The bacteria cleans the environment.
What are the three basic shapes of bacteria?
The three basic shapes of bacteria are ground, spear - shaped, Rod - shaped, and spiral - shaped.
Why might human immunodeficiency Viruses not cause symptoms right away? Which cells do they infect?
The virus is latent, the virus can become active and destroy cells.
Which cells of the body due in for influenza viruses infect first? What happens after that?
They infect Cells lining the lungs, your respiratory system then they enter lung cells.
What are these structures that some plants used to process nitrogen? How do you structures work with the plans to convert nitrogen?
They use hodules, some convert it from the atmosphere.
What happened to the parts of the bacterium that are not protected by endospore.
They will die off.
In which types of conditions wouldn't endospore be present?
Three conditions are intense heat, cold, or a drought.
Conjugation is not considered to be reproductive although it does increase genetic diversity.
True
Endospores protect bacteria from unfavorable conditions by allowing them to remain dormant. T/F
True
Extreme environments or habitat Extreme environments are habitats for unicellular prokaryotes called archaea. T/F
True
Some battery can form an indoor sport, which is a wall around the chromosome and part of the cytoplasm.
True
Unicellular prokaryotic's called bacteria live almost everywhere on earth. T/F
True
Ways to obtain food and to move dip or among bacteria types. T/F
True
Whiplike structures called flagella are used by many bacteria to move.
True
Explain how viruses can still attached to host cells even if the Host cells change over time.
Viruses have to adjust to the changes of the Host cell.
