The atmosphere and seas of the early earth lacked oxygen. what kind of organisms could not have lived under those conditions?

Is gravity a theory or a law

How does ATP transfer energy to a reactant in an endergonic reaction?

What must happen for a metamorphic rock to become igneous

What is one result of mitosis? -Four haploid cells -Two haploid cells -Two diploid cells -Four diploid cells

Why is the unsaturated zone not filled with water? It is below the water table and water stays above it. It is clay and water pools above it. It is granite and water flows around it. It is permeable and water flows through it.

Ryan accidentally drops a very heavy object on his foot. In a matter of just a few seconds, he feels a tremendous amount of pain. He experienced the pain quickly because neurons rapidly carries the impulse to the brain.

What r 5 main reasons for getting a nosebleed

How does mccandless compared with the other wanderers?

If an individual inherits two of the same alleles, either both recessive or both dominant for a particular trait, the inherited genotype is what

What aspects of abundance do population density and population size measure, respectively?