Grade 7 Cells

The simplest structures that can carry out all of the activities characteristic of life are:

• cells

• atoms

• molecules

• crystals

Cell theory states that all ____ are made of cells.

• atoms

• molecules

• non-living things

• living things

Tissues are composed of groups of...

• unicellular organisms

• specialized cells

• specialized organs

• organisms

Which of the following is made of cells?

• a rock

• a snowflake

• a raindrop

• a leaf

Which of the following statements is true about all cells?

• they are all part of tissues

• they all contain chlorophyll

• they all have a cell wall

• they all have a cell membrane