Question

unit: 1 level: 1 assignment: b - cell biodiversity
write the i can statement(s) for the day in the space provided.
i can understand that there is biodiversity in even our smallest living regions.
content connection (review/ reinforce to past material)
a prokaryote is a unicellular organism that lacks a membrane - bound nucleus. bacteria are prokaryotes that fall into two major categories: the eubacteria and the archaebacteria. eubacteria are common types that occur all around us, usually they are on surfaces and in the soil. you can only find archaebacteria in extreme environments, like hot sulfur springs. archaebacteria are thought to be some of the oldest life forms on earth. most bacteria dont make their own food. that means they must rely on other organisms or substances to get food. these bacteria break down, or decompose, other living things to obtain energy.
when most people hear the word bacteria, they think of something that is bad for you. in fact, very few bacteria cause illnesses. some bacteria actually help you! bacteria are used to make food, such as cheese and yogurt, and they can also help to break down harmful substances in the environment. scientists created a type of bacteria that could clean up oil spills. some bacteria live inside the guts of animals and help them to digest food.
unfortunately, there are many types of bacteria that can make us ill. salmonella bacteria can cause food poisoning, and certain types of bacteria are responsible for other infections. you might have had some experience with streptococcus.

1. what bacteria causes strep throat?
2. what are the oldest life forms on earth?
3. what bacteria is associated with food poisoning?
4. what part of the bacteria cells helps it stick to surfaces?

Explanation:

Step1: Recall streptococcal bacteria

Streptococcus pyogenes causes strep throat.

Step2: Identify ancient life - forms

Archaebacteria are among the oldest life - forms.

Step3: Recall food - poisoning bacteria

Salmonella is associated with food poisoning.

Step4: Recall bacterial cell part for adhesion

Pili help bacteria stick to surfaces.

Answer:

1. Streptococcus pyogenes
2. Archaebacteria
3. Salmonella
4. Pili