Cells, Organ Systems, and More

What is an ecosystem?

• grains, dairy, and fruit

• the living and nonliving things in an area

• plant cells that are stiff

What do you call a group of cells?

• System

• Chloroplasts

• Tissue

How many cells are in the human body?

• 1,000,000,000

• 1,000,000

• 1,000,000,000,000

What type of tissue lines your cheeks? (Smile)

• charmin

• skin

• epithelial

• epidermis

Who was the first to observe one-celled living things such as bacteria and paramecia?

• Leeuwenhoek

• Einstein

• Hooke

Which is considered non living?

• trees

• toenail

• kitten

What are organs?

• groups of tissues working together

• organ system

• a group of cells working together.

What living thing can carry out its life activities on its own?

• organs

• organism

• ecosystem

• tissue

What was Leeuwenhoek the first to discovery?

• cork cells

• red blood cells

• one celled living things

All organisms of the same kind living in a particular is called...

• community

• population

• ecosystem