What are two reasons why the fit isn't perfect if the continents were once Pangaea?

What is natural selection sometimes referred to?

Which of these is an example of competition? The Spider builds a web between two plants Mushrooms gain nutrition from a tree trunk Crow and seagull try to snatch food from each other Cape buffalo gets cleaned up as oxpecker eats insects

What plants or living organisims does acid rain effect the most?

The enzymes pepsin and trypsin don't work at the pHs of what?

Living things within an ecosystem

Seeking shelter from the cold is an example

Which equation below is a direct variation? A. 1/6x=y B. x + 2 = y C. y + 2 = x D. y = 2x + 6

Which type of mutation occurs in respective cells and can be passed to offspring

Scuba Steph went scuba diving today. As she swam deeper into the ocean, the temperature and density of the water changed. What changes happened? Temperature decreased; density decreased A. Temperature decreased; density increased B.

A primary transcript (immature, non-processed) single-stranded RNA molecule has the following nucleotide composition: 30% A, 20% G, 24% C, and 26% U.