biology - ecosystems and material cycles Flashcards
(7 cards)
1
Q
Define population in biological terms
A
The amount of animals in an area
2
Q
Define community in biological terms
A
The combined group of animals in a habitat
3
Q
Is the relationship between a tick and a dog mutualistic or parasitic?
A
parasitic
4
Q
Why do food chains have only 5 trophic levels?
A
Because only 10% of the potential energy is passed on through the trophic levels, the people at the top aren’t getting enough.
5
Q
Fill in the blanks: “_________________ is caused by the runoff of chemicals from crop fields.”
A
Eutrophication
6
Q
What is food security
A
The state of having reliable access to sufficient, affordable, nutritious food
7
Q
What is the only process that removes carbon dioxide from the air in the carbon cycle?
A
Photosynthesis
