Which of the following does Earth's atmosphere make possible? Select all that apply.

Volcanoes erupting
A biosphere existing
Dynamic recycling of materials needed for most processes on Earth
Projectile motion
Maintaining a steady and habitable temperature on Earth

Which of the four major uses is predicted to change the least by 2020?

What will happen to a population of predators if there is a sudden, temporary increase in the number of prey? a. the population of predators will be uniform with no change. b. the population of predators will increase first and then decrease slowly. c. the population of predators will increase continuously.

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation.c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation.d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.