Scientists believe that early plants released oxygen in a process called photosynthesis. where did the carbon dioxide needed for photosynthesis come from in the early atmosphere?

How do scientists describe the independent microorganisms (comprised of about 90% of our 100 trillion cells) in the human body?

How do ukaryotic cells differ from each other

What is underground layer of rock or sediment that holds water?

What way does the Earth's atmosphere interact with the geosphere

What is an example of a molecule that would require facilitated diffusion to enter a cell?

What happens when you get scared "Half to death twice"?

Atoms of different elements combine to form

How does mRNA differ from DNA? a. mRNA contains ribose sugars; DNA contains deoxyribose sugars. b. mRNA contains the base uracil; DNA contains the base thymine. c. mRNA is single-stranded; DNA is double-stranded. d. All of the above are correct.

Type of sponge that mimic synthetic sponge

Name two roles of parenchyma cells and briefly explain how these cells are specialized for these roles