Sustaining Ecosystems Flashcards
The thin layer that covers the earth; where all like resides is called what?
Biosphere
Name one Canadian biome and one index species of animal and plant that lives in it.
Marine biome; Plankton; lobster
Why does a natural ecosystem usually have more biodiversity?
In artificial ecosystems, humans add things to the ecosystem that could limit the types of organisms, where in natural ecosystems, humans don’t impact the amount of organisms
All the members of the same species, living in the same ecosystem or habitat is called what?
Population
Where do herbivores get their energy from?
Producers
What do nitrogen-fixing bacteria do?
Turn nitrate gas into nitrates
What do autotrophs do?
Carry out photosynthesis
List 2 abiotic limiting factors of population growth.
Amount of sunlight, soil and water. Natural disturbances(fires, storms, droughts)
List 2 biotic limiting factors of population growth.
Disease and presence of predators.
Why are cellular respiration and photosynthesis considered complimentary?
Each cycle uses what the other produces.
What is the balanced equation of photosynthesis?
6CO2 + 6H2O + sunlight = C6H12O6 + 6O2
What is the balanced equation for cellular respiration?
C6H12O6 + 6O2 = 6CO2 + 6H2O + energy
List 2 specific ways living organisms use the element nitrogen.
To produce amino acids; to produce proteins.
List 2 specific ways living organisms use the element phosphorus.
To make bones; to make shells.
Why are decomposers important to the carbon cycle?
They break down organic matter to make carbon dioxide.
