Carbon-12 is the most common isotope of carbon. It has 6 protons, 6 neutrons, and 6 electrons. Or it's 6 electrons, 4 are valence electrons. How many covalent bonds can a carbon atom form?

What is a river basin?

In a large population of sea stars, half of the individuals possess the red allele and half possess the purple allele. Those with the purple allele are better able to hide from predators. Therefore, more of them will survive and reproduce.

What cells are affected in glomerulonephritis and how is there a disruption of diffusion or osmosis?

Which organisms lived during the centozoic era?

If a woman and her husband, who are both carriers, have three children, what is the probability that all three children have the normal phenotype? Express your answer as a fraction using the slash symbol and no spaces (for example, 1/16)

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.