
Primary and Secondary succession
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is primary succession?
Back
Primary succession is the process of ecological change that occurs in an area where no soil exists, such as after a volcanic eruption or glacier retreat.
2.
FLASHCARD QUESTION
Front
What is secondary succession?
Back
Secondary succession is the process of ecological change that occurs in an area where soil is present but has been disturbed, such as after a forest fire or human activity.
3.
FLASHCARD QUESTION
Front
What are pioneer species?
Back
Pioneer species are the first organisms to colonize a barren environment in primary succession, such as lichens and mosses.
4.
FLASHCARD QUESTION
Front
What is the role of grasses in ecological succession?
Back
Grasses can grow in areas with shallow soil and help stabilize the soil, making it suitable for other plants to grow.
5.
FLASHCARD QUESTION
Front
Why do plants and animals need nitrogen?
Back
Nitrogen is essential for the growth of plants and animals as it is a key component of amino acids, proteins, and nucleic acids.
6.
FLASHCARD QUESTION
Front
Can plants use nitrogen directly from the air?
Back
No, plants cannot use nitrogen directly from the air; they need it to be converted into a usable form by bacteria in the soil.
7.
FLASHCARD QUESTION
Front
What happens to a food web if a key species is removed?
Back
Removing a key species can disrupt the food web, leading to population declines or increases in other species.
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