Cells and Microorganisms

The table lists information about different types of bacteria.

Which of the following statements is true based on information found in the table?

• Each type of bacteria can cause only one disease

• Fever is present in any living organism with bacteria

• Some bacteria cause diseases, but some bacteria are beneficial

• All forms of bacteria are infectious agents

Mollie thinks that bacteria can be harmful to humans. She learned that E. coli is a bacteria that is found in the intestines of humans. She also learned that different strains of E. coli affect the intestines differently. Which effect of E. coli supports Helen's claim that bacteria can be harmful to humans?

• Some strains of E. coli increase digestion of food

• Some strains of E. coli produce vitamin K

• Some strains of E. coli increase absorption of nutrients

• Some strains of E. coli damage the intestinal wall

Fidel's mother tells him that he should wash his hands often with soap and water. Fidel knows that washing his hands can help prevent the spread of microorganisms.

Why is it important not to spread microorganisms?

• Microorganisms can cause people to get sick

• Microorganisms give people energy

• Microorganisms have a bad taste

• Microorganisms always make people healthy

Which statement provides the best evidence that microorganisms can benefit plants?

• Bacteria infect living plants, causing them to become diseased and eventually die

• Plants provide a habitat for bacteria

• Plants use bacteria as a food source

• Bacteria decompose dead plants, releasing nutrients into the soil to be used by living plants

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NGSS.MS-LS2-3

What cell part is labeled "A" in the picture below?

• Cytoplasm

• Cell Membrane

• Cell Wall

• Nucleus

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NGSS.MS-LS1-2

Look at the diagrams of the plant and animal cells.

Which of the following structures are found in the plant cell but NOT in the animal cell?

• Chloroplasts

• Cell Membrane

• Ribosomes

• Endoplasmic Reticulum

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NGSS.MS-LS1-2

Examine the pictures of the plant and animal cells.

Which of these statements is true about plant and animal cells?

• Animal cells contain mostly sugar, and plant cells contain mostly water

• Plant cells are usually shaped like boxes with flat sides, but animal cells can have many different shapes

• Plant cells are usually much smaller than animal cells because plants have more cells than animals

• Animal cells are surrounded only by cell membranes, and plant cells are surrounded only by cell walls

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

An amoeba is a living thing that is made up of only one cell. It is too small to see with just your eyes.

What tool can be used to see an amoeba?

• Hammer

• Pencil

• Microscope

• Sunglasses

Which cell structure acts as a brain/control center for the cell?

• Nucleus

• Vacuole

• Cell wall

• Cytoplasm

Tags

NGSS.MS-LS1-2

This organelle is in both plants and animals. It is a barrier between the cell and the environment. (It controls what goes in and out of a cell.)

• cell wall

• cell membrane

• cell organelles

• mitochondria

Tags

NGSS.MS-LS1-2