Answer: Abiotic factor for polar: Ice
Abiotic for desert: Sand
Biotic for polar: Polar bears
Biotic for desert: Cacti
The types of factors are different because there are different set conditions for each ecosystem. A cactus is built for it's hot, dry ecosystem. If it were to move to a polar ecosystem it would not survive there. Same for the polar bear. It's built for polar regions. It has white fur to blend with the white ice to help it blend in and it's adapted to swim to get it's food source.
Explanation:
Real number : 8394000000
scientific notation : 8.394 x 10^9
Sure. Single-cell organisms include bacteria and hens' eggs.
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
The smoke increases effectively increasing the planetary albedo, forcing is less however and tends to be insensitive to the solar geometry
