How many pairs of chromosomes do human cells have?

The Sun produces energy by fusing hydrogen atoms into what atoms in its core.

Which organism forms the primary source of food for a deep-sea community at a hydrothermal vent? A. phytoplankton B. zooplankton C. all pelagic organisms D. giant tube worms E. chemosynthetic bacteria

The final stage of mitosis during which the chromosomes migrate to the pole me of the cell and unwind

How might the presence of meristems explain the ability of plants to regenerate from cuttings?

To determine whether regulation of gene expression by short RNAs was a naturally occurring phenomenon, researchers isolated RNA from a cell and fractionated them by size to obtain only short RNAs. The next step was to clone these molecules.

John, a 19 year old boy, wanted to figure out why he wasn't sleeping well at night. He normally and heads to bed by 11 pm and wakes up about 6 am.

What is the base-pairing rule for DNA?

What kind of bond forms between oxygen and hydrogen in a single water molecule? A. Ionic B. Metallic C. Polar covalent D. Hydrogen

Aflatoxins are the most common sources of food-borne illness in the united states. a. True b. False

If you kick a soccer ball on a field of grass, it will stop because