Understanding Cells and Organisms

Any living thing

• Organism

• Cell

• Tissue

• Species

All _________________________ are composed of cells.

• Living things

• Rocks

• Water

• Air

___________________________ organisms are composed of different kinds of cells.

• Unicellular

• Multicellular

• Prokaryotic

• Eukaryotic

What sort of evidence must be gathered to support the idea that all living things are composed of cells?

• Samples of many kinds of living things should be examined under a microscope to identify the presence of cells.

• DNA sequencing of various organisms to determine genetic similarities.

• Observations of living organisms in their natural habitats without any scientific tools.

• Chemical analysis of the elements present in living organisms.

Organisms that consist of many cells

• Unicellular

• Multicellular

• Acellular

• Bicellular

Organisms that consist of a single cell

• Multicellular

• Unicellular

• Colonial

• Prokaryotic

Which of the following best describes the relationship between cells and living things in general?

• All living things are made up of one or more cells.

• Cells are only found in plants and animals.

• Living things can exist without cells.

• Cells are the smallest unit of matter in the universe.

Which of the following statements is TRUE about cells?

• Cells are the smallest unit that can be considered alive.

• Cells are only found in multicellular organisms.

• Cells can survive without any nutrients.

• Cells are larger than tissues.

Which of the following observations provides evidence that the smaller parts of living things, and not the non-living things, are cells?

• carry out functions that sustain life such as respiration.

• are made up of molecules and atoms like non-living things.

• can be seen with the naked eye without a microscope.

• are always larger than non-living things.

The basic unit of life

• Cell

• Tissue

• Organ

• Organism