A selectively permeable membrane prohibits the movement of some substances across the membrane. a. True
b. False

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

Which describes a grizzly bear’s habitat?

The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?