
AP Env Sci Unit 1 & 2
Flashcard
•
Science
•
12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What cycle is dependent on bacteria for fixation and denitrification?
Back
Nitrogen Cycle
2.
FLASHCARD QUESTION
Front
What is a keystone species?
Back
A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
3.
FLASHCARD QUESTION
Front
What is nitrogen fixation?
Back
The step in the biogeochemical cycle where nitrogen gas from the atmosphere is converted into ammonia by bacteria that live in the soil and on the roots of plants.
4.
FLASHCARD QUESTION
Front
What is the main difference between primary and secondary ecological succession?
Back
Primary succession begins WITHOUT soil; Secondary succession begins WITH soil.
5.
FLASHCARD QUESTION
Front
What role does a keystone species play in an ecosystem?
Back
A keystone species helps to hold an ecosystem together.
6.
FLASHCARD QUESTION
Front
What is denitrification in the nitrogen cycle?
Back
The process by which bacteria convert nitrates back into nitrogen gas, returning it to the atmosphere.
7.
FLASHCARD QUESTION
Front
What are the main components of the nitrogen cycle?
Back
Nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.
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