3.2.4 Domains of Life: Bacteria

Match

Match each word to its definition.

• the basic unit of living things

• material that carries information about how an organism will look and function

• too small to see using your eyes

• made of one cell

cell

DNA

microscopic

unicellular

• cell

• DNA

• microscopic

• unicellular

Multiple Select

According to the video, which of the following jobs do bacteria perform?

• provide shelter for larger organisms during bad weather

• keep harmful bacteria from growing on the skin

• break down food and produce vitamins in the digestive system

• decompose dead organisms in ecosystems

Multiple Choice

True or false:

Staining bacterial cells makes them easier to see through a microscope.

• True

• False

Multiple Choice

How is the image of the bacteria you see through the microscope different from living bacteria?

• The specimen under the microscope is pink due to the stain.

• The bacteria under the microscope is unicellular, but actual bacteria consist of many cells.

• The image is much larger than actual bacterial cells.

• The image through the microscope is a drawing of bacteria.