Introduction to Ecology

What is the most basic unit of life?

• cell
• tissue
• organ
• organ system

The scientific name for something living is a(an)

• organism
• cell
• tissue
• human

An organism made of one cell is called

• unicellular
• multicellular

The combination of chemical reactions through

which an organism builds up or breaks down

materials as it carries out its life processes is called ...

• absorption

• metabolism

• digestion

• consumption

Maintaining a stable internal

environment is called

• homeostasis

• equilibrium

• balance

• evenness

Green plants produce their own food through the process of photosynthesis. Which characteristic of life does this represent?

• All living things use energy

• All living things contain cells

• All living things maintain homeostasis

• All living things grow

A baby song bird hatches from its egg with both parent songbirds watching. Which characteristic of life does this represent?

• All living things reproduce

• All living things maintain homeostasis

• All living things use energy

• All living things grow

Rocks are not living because

• they never move
• they aren't needed for humans
• they are not made of cells
• they don't break down

A worm turns away from light is an example of a worm

• reproducing
• doing cellular respiration
• having cells
• responding to its environment

Which one of the following is a characteristic of life?

• Growth

• Breathing

• Expelling toxins

• Photosynthesis