Weegy: Sudden large declines in biodiversity in the fossil record are called: mass extinctions.
User: What does biodiversity mean?
A. the variety of ecosystems
B. the variety of life in an ecosystem
C. the variety of landforms
D. the variety of humans
Weegy: Biodiversity means: the variety of life in an ecosystem.
User: Which is not affected by acid rain?
A. plants
B. animals
C. fossil fuels
D. lakes
User: How many times in the history of Earth has the number of species dropped drastically?
A. 4 times
B. 3 times
C. 5 times
D. 6 times
Weegy: 5 is the number of times in the history of the Earth that the number of species dropped drastically.
User: Why would there be a concern if we lost our rain forest?
A. rain forest is beautiful
B. rain forests contain a large amount of biodiversity
C. rain forest produces a lot of rain
D. rain forest produces a large amount of food resource
Weegy: There be a concern if we lost our rain forest because: rain forests contain a large amount of biodiversity. [smile]
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