As altitude increases, what happens to the pressure of the air? the air pressure increases at first then it decreases. the air pressure stays the same. the air pressure decreases. the air pressure increases.

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

Sexual reproduction in the parent cell will result in offspring with a) identical genetic information. b) half the genetic information. c) double the genetic information. d) four times the genetic information.

When plants use sunlight to make food, the energy of sunlight is