Multicellular Organisms

Question 1

What are the 10 biological levels?

Answer 1

Cell
Tissue
Organ
Organ System
Organism
Population
Community
Ecosystem
Biome
Biosphere

Question 2

Define “cell”

Answer 2

• Smallest unit of life
• All living things are made of cells

Question 3

Define “tissue”

Answer 3

• Many cells working together for a combined function

Question 4

Define Organs

Answer 4

• Made of tissue
• Have many different functions
  Examples: Liver, heart, brain, lungs

Question 5

Define “Organ System”

Answer 5

• Many different organs working for a unified purpose
  Examples: Digestive System, Respiratory system.

Question 6

Define “Organism”

Answer 6

A single living “creature”
Made up of all of the above
Examples: Humans, Dogs, Fish, Bacteria

Question 7

Define “Population”

Answer 7

Many of the same species living together
Can breed with each other
Examples: A school of fish, a pack of wolves

Question 8

Define “Community”

Answer 8

Many different populations living together
Does not include abiotic factors (non-living)

Question 9

Define “Ecosystem”

Answer 9

Same as community but with consideration of abiotic factors
Can be found in different regions across the globe
Examples: pond ecosystem, desert ecosystem

Question 10

Define “Biome”

Answer 10

An area with many similar ecosystems
Example: Rainforest, Desert

Question 11

Define “Biosphere”

Answer 11

Anywhere on our planet where organisms can live