Cells & Microorganisms

What is a microorganism?

• The basic unit of life.

• Anything that takes up space.

• All things, living & non-living.

• A microscopic living thing.

What is the outside layer of a plant cell called?

• cell membrane

• nucleus

• cell wall

• chloroplasts

What are the three organelles that animal and plant cells both have?

• nucleus, cytoplasm, and cell wall

• nucleus, chloroplasts, and cytoplasm

• cytoplasm, nucleus, and cell membrane

• chloroplasts, cell membrane, and nucleus

What are the two organelles that plant cells have that animal cells do not have?

• cell wall and cytoplasm

• chloroplast and cell wall

• nucleus and chloroplasts

• cell membrane and cell wall

Which sentence describes how the differences between a plant cell and an animal cell can be determined by just looking at the organelles inside the cell?

• Plant cells have a nucleus, but animal cells do not.

• Plant cells have chloroplasts, but animal cells do not.

• Plant cells do not have a nucleus, but animal cells do.

• Plant cells do not have chloroplasts, but animal cells do.

Tags

NGSS.MS-LS1-2

Which claim is supported by evidence in the drawings?

• The student observed microscopic algae only on the slide because algae grow larger when placed on a microscope slide.

• The student observed microscopic algae only on the slide because all of the algae cells were removed from the pond water on the microscope slide.

• The student observed microscopic algae only on the slide because algae cells are too small to be seen without magnification by a microscope.

• The student observed microscopic algae only on the slide because the water in the jar was too cloudy to see the algae.

The pictures below show the structure of two cells. Which sentence explains why the shape and structure of the two cells are different?

• Cell X is shaped like a circle because it is a plant cell, which means it does not have a cell wall, and cell Y is shaped like a rectangle because it is an animal cell, which means it has a cell wall.

• Cell X is shaped like a circle because it is a plant cell, which means it has a cell membrane, and cell Y is shaped like a rectangle because it is an animal cell, which means it does not have a cell membrane.

• Cell X is shaped like a circle because it is an animal cell, which means it does not have a cell wall, and cell Y is shaped like a rectangle because it is a plant cell, which means it has a cell wall.

• Cell X is shaped like a circle because it is an animal cell, which means it has a cell membrane, and cell Y is shaped like a rectangle because it is a plant cell, which means it does not have a cell membrane.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

A student observed a label found on raw chicken meat sold at the grocery store. WARNING!!! Cook thoroughly to kill bacteria. Which argument should the student use to support a claim that some bacteria are harmful to humans?

• Some bacteria can harm humans because bacteria become toxic when cooked at high temperatures.

• Some bacteria can harm humans because bacteria make food taste bad when it is not cooked properly.

• Some bacteria can harm humans because bacteria can cause food poisoning when contaminated food is not cooked properly.

Something that is too small to see with the naked human eye

• Cell Wall

• Microscopic

• Organelles

• Cytoplasm

The organelle that protects the cell, holds it together, and controls what goes into or out of the cell

• Nucleus

• Cell Wall

• Cell Membrane

• Chloroplasts

Tags

NGSS.MS-LS1-2