Flashcards in Unit Test Review Deck (44)
What are the 4 trophic levels
Feeding level of one or more organisms in a food web
An animal that feeds on dead plant or animal material
Organisms that consume dead plant material and animal waste.
Feed at all trophic levels
Varios bacteria and fungi that break down dead material and waste and extract the remaining nutrients
When an animal takes in food what percentage goes where
Cellular respiration -30%
3 elements that make a carb
Carbon dioxide+ water+ light energy --->carb+oxygen
Cellular respiration equation
Oxygen+carb---->carbon dioxide+water+ thermal energy
4 most elements
What type of plants bring lots of carbon
Legumes like alfalfa,clover and beans because the rhizobia on their roots attracts nitrogen and fixes it.
What 2 ions does nitrogen make
When more nitrogen is added to the environment then can be absorbed.
When excess nitrogen washes from the soil into streams and ground water because it wasn't absorbed. I
Effects of nitrogen saturation
Stunted plant growth
How is nitric acid formed
When nitrogen containing gases from industrial smokestacks dissolve in the moisture in the air.
The buildup of nutrients in an aquatic ecosystem.
The added nitrates initially create a population explosion of algae in warm surface waters.
The variety of living creatures in an ecosystem.
Only 1 type of organism in an area
When certain harmful substances like pesticides move up through a food chain
Occur due to the degree of overcrowding
Occur regardless of population
Illegal hunting or fishing
Bacteria that can convert ammonia to nitrates
The conversion of ammonia to form nitrates
The process of converting nitrates to nitrogen gas
Bacteria that can convert nitrates to form nitrogen gas
Manitoba endangered species and ecosystems act