One major difference between plant and animal cells is that plant cells are the only ones with

• chloroplasts

• nucleus

• cytoplasm

• cell membrane

Identify which organelle is represented by C in the picture:

• nucleus

• vacuole

• ribosome

• golgi apparatus

Tags

NGSS.MS-LS1-2

Your science teacher asks you to build a model of a cell. The model should look like a city, and buildings in the city should represent parts of a typical cell. Each building's real-life function should be like the function of the organelle it represents. For example, the vacuole of a cell, which stores water, could be a water tower in your cell city model.

Explain which building should represent the nucleus?

• factory: manufacturing

• city hall: control center

• power plant: provides energy

• highways and streets: transportation

Tags

NGSS.MS-LS1-2

This simple bacteria cell has the same structure as more complex cells. It controls what comes in to and leaves the cell and also maintains homeostasis. It is the

• capsule.

• cytoplasm.

• membrane.

• wall.

Tags

NGSS.MS-LS1-2

A student is observing a group of cells under a microscope. What observation would help her conclude that they are plant cells?

• The presence of nuclei can be clearly detected within each cell.

• The cells appear well-defined, indicating the presence of cell walls.

• The presence of mitochondria can be clearly detected within each cell.

• The cytoplasm in which the cell organelles are embedded can be clearly seen.

What is an example of a microorganism acting in a harmful way?

• Bacteria spoiling food.

• Bacteria aiding digestion.

• Yeast used to make pizza crust.

• Fungi decomposing waste in a septic tank.

What is one common way to keep from ingesting harmful bacteria you may have touched during the day?

• Washing your hands before you eat.

• Keeping your hands in your pockets.

• Avoiding foods that might make you sick.

• There is no way to accomplish this easily.

The flu is a disease caused by the flu virus. Many other diseases, like pneumonia, are caused by bacteria. Do all microorganisms cause harm to the human body?

• No, only the flu virus can cause harm to the human body.

• No, many microorganisms, like those in your gut, are beneficial.

• Yes, any microorganism that enters your bloodstream will be harmful.

• Yes, any microorganism that comes in contact with your skin will be harmful.

Tags

NGSS.MS-LS2-4

Mrs. Sail's class wanted to observe a local pond. The class collected some pond water to analyze. When they placed a drop of the water under a microscope, they saw many small squiggly shapes that were swimming through the water.

These could be an example of what?

• Electron and proton locomotion.

• Atoms floating through the water.

• Microorganisms that live in the pond.

• Macroorganisms that live in the pond.

One of the differences between a plant and animal cell can be found surrounding the outer cell structure of the plant cell. It provides structure and support to the plant cell. What is this structure?

• cell wall

• cytoplasm

• chlorplast

• mitochondria

Tags

NGSS.MS-LS1-1