How many covalent band can carbon form to other atoms

Which of the following defines the Permian-Triassic? a The mass extinction that could occur if an asteroid were to hit the Earth.

What Role Does the Sun Play in Producing Winds And Ocean Currents

Do arthropods vary in size? If so, by how much?

The human genome sequence shows that genes A and B are at opposite ends of chromosome 9. If an individual who is heterozygous for both genes (AaBb) mates with an individual that is homozygous recessive for both genes (aabb), how many of their

In which eon did photosynthesis first happen?

Animal lays eggs with a tough leathery watertight shell

Why is DNA antiparallel? It has double strands complementing each other. The bases in one strand pair with the other bases in the complementary strand. It has a ladder shape. Its double strands run in opposite directions.

Which of these is a solution, where the solute and solvent are in the gas phase? A) air B) ozone C) brass D) carbon dioxide

The roads in northern states (like Michigan) need to be repaired more often than roads in southern states (like South Carolina). Explain the effects mechanical weathering could have on this?

A substance that form hydrogen ions when dissolved in water is called a?