Question

Which of the following is true of population cycles

Answer 1

where are the options??

Answer 2

Population cycles signal an imbalance in an ecosystem.
Keystone species are necessary to establish population cycles.
A new species introduced to an ecosystem tends to stabilize population cycles in the ecosystem.
Population cycling helps maintain a healthy ecosystem.

Answer 3

ok!

Answer 4

second one

Answer 5

keystone.....cycles

Answer 6

ok thanks

Answer 7

Which of the following are biotic factors and which are abiotic factors?

Rain and grass are biotic; wind and humidity are abiotic.
Algae and fungi are biotic; temperature and rainfall are abiotic.
Oxygen and sunlight are biotic; maple trees and spiders are abiotic.
Fish and whales are biotic; plankton and bacteria are abiotic.

Answer 8

It would be B. (I already took the test :D)

Answer 9

To the one you just asked, not the one above.