Plant cells and animal cells: how they are alike and different
Grade 7 Science Worksheet
Circle the best answer.
It has no chloroplasts. Ari reads a cell card. Which conclusion is right?
- A plant cell, but it cannot release energy from sugar without chloroplasts
- An animal cell, because roots grow underground
- An animal cell, because it has no chloroplasts
- A plant cell, because it has a cell wall and a large central vacuole
Bo reads a cell card. Which conclusion is right?
- A plant cell, because it has mitochondria to use energy
- Not a cell, because it has no cell wall
- A plant cell, because its membrane is a thin cell wall
- An animal cell, because it has a membrane but no wall or chloroplasts
Esme reads a cell card. Which conclusion is right?
- A plant cell, because it has a cell wall instead of a membrane
- Hard to say, because moss has no flowers
- An animal cell, because it has mitochondria
- A plant cell, because it has a cell wall and chloroplasts
Read this first
Microscope card (read about; the teacher prepared the slide)
Onion skin, stained. Boxy cells in neat rows, a thick line around each cell, one dark dot in each cell, no green parts. Not to scale.
Jun’s teacher shows a prepared slide through a microscope. Why are no green parts seen?
- Onion skin cells are animal cells
- The thick cell walls block the green color
- The stain hides the chloroplasts from view under the microscope
- These bulb cells get no light, so they have no chloroplasts
Microscope card (read about; the teacher prepared the slide)
Cheek cells, stained blue. Flat cells with uneven, rounded edges, one dark dot in each cell, no thick outer line. Not to scale.
Kira’s teacher shows a prepared slide through a microscope. Why do these cells have uneven, rounded shapes?
- They have a flexible membrane and no stiff cell wall
- They have a soft cell wall that bends
- They have no edge around the cytoplasm
- They are not true cells, because they have no cell wall
“Student drawing of a leaf cell, not to scale, with each part named:” Milo drew a typical leaf cell and left out one part. Which part is missing?
- Nothing: plant cells have no mitochondria
- A second cell wall inside the membrane
- Nothing: the chloroplasts handle the cell’s energy
- Mitochondria
Noah drew an animal cell and left out one part. Which part is missing?
- A nucleus
- Chloroplasts
- A stiff wall to hold its shape
- A cell wall around the outside
Cell wall, cytoplasm, nucleus, mitochondria, chloroplasts, large central vacuole. Pia drew a typical leaf cell and left out one part. Which part is missing?
- Nothing: the cell wall does the membrane’s job
- A second nucleus
- Nothing: membranes belong in animal cells, not plant cells
- A cell membrane just inside the cell wall
Cell theory card
(1) All living things are made of one or more cells. (2) The cell is the basic living unit. (3) New cells come only from cells that already exist. Growth table (example data): Day 1, root 2 cm; Day 3, root 4 cm; Day 5, root 7 cm.
Ren measures a bean seedling’s root, which grows longer each day. Where do the new root cells come from?
- The old cells stretch longer; no new cells form
- Existing root cells divide to make new ones
- Water in the root turns into cells
- The soil turns into new root cells
Cell theory card
(1) All living things are made of one or more cells. (2) The cell is the basic living unit. (3) New cells come only from cells that already exist. Note: the pond water holds a living thing made of just one cell.
Tala’s class reads about a pond water sample. Which statement fits cell theory?
- It formed from pond water and mud
- It is too small to be alive, so it is not considered a living thing
- It is alive, but it is not made of cells
- It is alive, and its one cell does all of its life processes