Chap. 3 Ecology

Question 1

Habitat

Answer 1

natural home/environment of a living organism

Question 2

Niche

Answer 2

an organism’s position/role in a community and how it interacts with physical/environmental conditions/other species

Question 3

Competitive exclusion principle

Answer 3

Species that compete for the same resource cannot coexist

Question 4

Keystone species

Answer 4

An important species in an ecosystem that has a large effect on the ecosystem as a whole

Question 5

Heterotroph

Answer 5

Organisms that eat other organisms

Question 6

Autotroph

Answer 6

Organisms that produce its own food

Question 7

Food chain

Answer 7

Relationship between organisms showing what consumes/what they consume

Question 8

Food web

Answer 8

lots of food chain

Question 9

1st trophic level

Answer 9

Producers/Autotrophs, organisms that make their own food. photosynthesis/chemosynthesis

Question 10

2nd trophic level

Answer 10

Primary consumers/heterotrophs: eat plants/herbivores

Question 11

3rd trophic level

Answer 11

Secondary consumer/heterotroph: eat consumers/produces of second level

Question 12

4th trophic level and up

Answer 12

Tertiary consumer/Apex predator: eat all below

Question 13

Energy pyramid

Answer 13

Shows amount of energy at each level. Only 10% of energy is passed to the next trophic level

Question 14

Biomass pyramid

Answer 14

Shows biomass(biomass: total amount of living tissue within a trophic level
) in each level

Question 15

Pyramid of numbers

Answer 15

Number of organisms in each trophic level

Question 16

Water cycle

Answer 16

Evaporation -> Condensation -> Precipitation -> Seepage -> Runoff -> Storage

Question 17

Carbon reservoir

Answer 17

parts of Earth that store carbon e.g. ocean, land, atmosphere

Question 18

Carbon

Answer 18

building block of all living things, organic molecules have:lipid,protein,cars,nucleic acids

Question 19

Nitrogen Fixation

Answer 19

process of making atmospheric nitrogen into ammonia

Question 20

Nitrification

Answer 20

process where ammonia become nitrite/nitrate

Question 21

Denitrification

Answer 21

process of making nitrite/nitrate into gas nitrogen

Question 22

limiting nutrients

Answer 22

when an ecosystem is limited by a single nutrient that’s scarce. if more limiting nutrient is brought into ecosystem, ecosystem will go bonkers

Question 23

algal bloom

Answer 23

Rapid increase in algae caused by increase nutrients/warmer temps, steals resources/nutrients from species and is toxic

Question 24

population

Answer 24

group of same species living in same area

Question 25

community

Answer 25

group of diff. species living in same area