Which of the following gives a plant cell its strong structure and definite shape?
The cell wall is a strong, rigid structure that surrounds, protects and gives shape to plant cells.
Jayne's science class is doing a laboratory investigation on cells. Her teacher gives them each a cotton swab to collect cheek cells from their mouths. They then smear the cheek cells onto a glass slide and look at the cells under a microscope.
What can Jayne expect all of her cheek cells to contain?
A. a nucleus
B. a chloroplast
C. a cell wall
D. all of these
A. a nucleus
Animal cells, such as human cheek cells, contain many different structures that allow the cell to function. These structures include a nucleus, a cell membrane, and mitochondria.
Animals don't need chloroplasts because they acquire sugar from their diet; they just need mitochondria. They also don't have a cell wall.
Elodea is a type of plant that is often used in aquariums. Elodea cells are made up of chloroplasts floating in cytoplasm surrounded by a flexible cell membrane and a rigid cell wall.
Which arrow on the Elodea cell diagram below points to the cytoplasm of the cell?
Arrow C
All organisms are made up of one or more cells.
Which tool is used to observe cells and the structures within?
C. A microscope
Which cell part allows plants to produce food from sunlight?
D. Chloroplast
The chloroplast is the cell part that converts light energy from the sun into energy for the plant cells. Chloroplasts are found only in plant cells.
Which cell part is found inside the cell membrane, but outside the nucleus of an animal cell?
A. cytoplasm
The cytoplasm is a jellylike material inside the cell membrane that surrounds the nucleus of a cell and contains most of the cell's internal parts.
Animal Cells do not have a cell wall or chloroplast.
Kyle is observing a cell under a microscope. He makes a sketch of the cell and his teacher helps him label the parts.
Based on his sketch, Kyle concludes that the cell must be a plant cell.
How does Kyle know that the cell is a plant cell and not an animal cell?
Both plant and animal cells have many different structures that help them function. For example, all cells from both plants and animals have a cell membrane and a nucleus.
Only plant cells, however, have a cell wall.
A cell has many structures inside it. All of these structures are held in the cell by its covering. What is this covering called?
C. cell membrane
The cell membrane is the flexible covering of a cell. This structure holds the cytoplasm and other cell structures (such as the nucleus) in the cell body.
What does a plant cell's nucleus do?
The nucleus of the cell is the control center that stores inherited information.
The cell membrane
The cell membrane is a flexible structure that surrounds the cell and its other structures. It controls what enters and leaves the cell.
Look at the diagrams of the plant and animal cells below.
Which of the following structures are found in the plant cell but not in the animal cell?
A. chloroplasts
Plant cells and animal cells contain many of the same structures, such as a nucleus, a cell membrane, mitochondria, endoplasmic reticula, Golgi bodies, and ribosomes.
Animal cells do not contain chloroplasts, cell walls, or very large vacuoles, but plant cells do.
Juan is studying a group of cells under a microscope. His teacher tells him that the cells either came from the leaf of a tomato plant or the scale of a lizard.
Juan could conclude that the cells came from the tomato plant if they contained _______.
D. chloroplasts
Both plant and animal cells have many different structures that help them function.
For example, all cells from both plants and animals have a cell membrane and a nucleus. Only plant cells, however, have chloroplasts.
Why does a plant cell have a chloroplast and an animal cell does not?
A plant cell has a chloroplast because it needs to perform photosynthesis to create its own food using sunlight, while an animal cell does not have a chloroplast because animals obtain their food by consuming other organisms, so they do not need to photosynthesize.
What is one of the main functions of the nucleus of an animal cell?
D. It stores the genetic information of the animal
The main purpose of the nucleus is to store the genetic information of the organism. The genetic information is important because it controls the inherited traits of the organism and controls many of the organism's processes.
What type of cell is pictured below?
The cell pictured has a cell membrane, a nucleus, and cytoplasm. It does not have chloroplasts or a cell wall. The cell is an animal cell.
Dylan is using a microscope to look at the cells in onion skin. Why does he need a microscope to look at the cells?
All living things are made up of cells. Cells are very small. They are too small to see with the naked eye.
A microscope makes the cells look bigger so that Dylan can see them.
A plant cell is typically ___________ in shape due to the presence of a rigid cell wall.
A. Rectangular
B. Round or Irregular
A. Rectangular
Which sentence describes how the differences between a plant cell and an animal cell can be determined by looking at the parts inside the cell?
A. Plant cells have a nucleus, but animal cells do not.
B. Plant cells have chloroplasts, but animal cells do not.
C. Plant cells do not have a nucleus, but animal cells do.
D. Plant cells do not have chloroplasts, but animal cells do.
B. Plant cells have chloroplasts, but animal cells do not.
Cell Y is shaped like a rectangle because it is a _______________ which means it has a _____________
Cell X is Shaped like a(n) ____________ which means it ________________________
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 doesn't have a cell wall.
Cells are present
Cells are present in all living organisms. A living organism can have one cell or many cells, but all living organisms contain at least one cell.