unit 1

Question 1

list systems in order

Answer 1

biosphere
ecosystem
community
population
organisms
organs
tissue
cells
organelles
molecules

Question 2

the biosphere

Answer 2

all life on earth + all places where life exists

Question 3

ecosystem

Answer 3

unlike biosphere, consists of all living things in a particular area and non living things that life interacts with

Question 4

community

Answer 4

array of organisms in particular ecosystem

Question 5

population

Answer 5

all the individuals of a species living within a certain area

Question 6

organisms

Answer 6

individual living things

Question 7

organs

Answer 7

body part made up multiple functions with common function

Question 8

tissue

Answer 8

a group of cells that work together to do special functions

Question 9

prokaryotic cell

Answer 9

-bacteria/archaea
-lacks nucleus and organelles covered by a membrane
-smaller cell

Question 10

eukaryotic cells

Answer 10

-plants and animals
-has membrane enclosed organelles

Question 11

energy flow

Answer 11

• light energy comes from the sun
• plants convert sunlight to chemical energy
• organisms use chemical energy to do work
• heat is lost from ecosystem

Question 12

chemical cycle

Answer 12

• chemicals in plants are passed to organisms that eat the plant
• de-composers break down dead organisms and leafs to return chemicals to the soil
• plants take chemicals from the soil to the air

Question 13

Darwin’s 4 observations

Answer 13

• overproduction: more born than can survive
• there is heritable variation within a population
• competition for limited resources
• some organisms survive + reproduce based on adaptation