Think about each item and decide if it is made up of ONLY ATOMS, ONLY CELLS, or BOTH ATOMS AND CELLS.

Groups:

(a) ONLY ATOMS

,

(b) BOTH ATOMS AND CELLS

• elodea leaf

• bird

• a coin

• water molecule

• one bacteria cell

• chromosome

• sandstone

• sloth muscle

• one gram of salt

Jonathan incorrectly identified the cell to the right as an animal cell. Pick the reasons below that make Jonathan incorrect.

• The cell contains a cell membrane

• The cell contains chloroplast

• The cell has a cell wall.

• The DNA is found inside the cell's nucleus

• This cell has one large central vacuole

Which two functions are carried out by a plant cell, but not an animal cell?

• Plant cells make their own food through a process known as photosynthesis.

• The plant cell's mitochondria create energy

• Plant cells have a rigid shape

• Plant cells have proteins

The cell is the basic unit of life for both single-celled and multicellular organisms. Identify those features that are true for each type of organism.

Groups:

(a) True for cells in single-celled organism

,

(b) True for cells in multicellular organism

,

(c) True for both

• Each cell must perform all functions of the organism

• requires energy

• contains a cell membrane

• Each cell has specialized parts to perform specific functions for the cell.

• Each cell is designed to perform specific functions for the organism.

The pictures are of living organisms. What is true of ALL living organisms?

• All living organisms eat other organisms

• All living organisms are made up of at least one cell

• All living organisms move

• All living organisms have a nucleus in its cell(s).

A ____ cell contains more chloroplasts than any other type of plant cell.

Why do leaf cells contain more chloroplasts?

• They are able to capture more sunlight

• Because leaf cells are part of a plant and plants have chloroplasts

• Because leaf cells are part of an animal and animal cells have chloroplast

• This type of cell requires more energy which the chloroplasts supply.

A student wrote a story describing processes in a cell.

1. 1. Once upon a time there were sugar molecules in the capillaries surrounding a cell.

2. 2. The molecules entered the cell through tiny pores.

3. 3. Energy from the sugar was released to power cellular functions.

4. 4. One of those functions was the building of proteins.

5. 5. Waste products were broken down into smaller molecules.

6. 6. These smaller molecules were stored in a special “garbage bag” in the cell.

Sentences 2–6 occur in organelles present in the cell. Match an organelle to each sentence of the story.

• mitochondria

• Sentence 5

• vacuole

• Sentence 6

• ribosomes

• Sentence 2

• cell membrane

• Sentence 4

• lysosomes

• Sentence 3

Match the organelle with its function

• nucleus

• the control center of the cell

• chloroplast

• allows substances to move in and out of the cell

• mitochondria

• the organelle that breaks down nutrients to release energy

• cell membrane

• makes proteins for the cell

• ribosomes

• the site where photosynthesis takes place

Multi-celled organisms like plants and animals have a complex system with many organelles. Some organelles are found in both plant and animal cells. Other organelles are not found both places.

Select the organelles that are located in plant cells, animal cells, or both.

Groups:

(a) Animal Cell

,

(b) Plant Cell

,

(c) Both Plant and Animal Cell

• cell wall

• chloroplast

• lysosome

• mitochondria

• vacuoles

• cell membrane

• nucleus