Unlike Earth, the planet Mercury does not have an atmosphere. Let’s assume an alien species landed on both planets and released a tremendous amount of water vapor near the surface of each planet. How would each planet system be affected by this (think about temperatures)?

b is the best answer for this question.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

looks like the answer is     c     to me!