Dark skin (a result of increased melanin production in equatorial peoples) is likely a response to ultraviolet radiation, because uv radiation can cause:

What does the last 14 seconds on the "cosmic calendar" represent?

Birds almost always migrate A: during the day B: at night C: on cloudy days D: at noon

What is the ploidy of organisms that have two sets of chromosomes? what is the ploidy of organisms that have two sets of chromosomes? 3n 4n n 2n?

This French scientist discovered a process to remove bacteria from milk to prevent souring. He demonstrated that the bacteria could be removed by boiling and then cooling the liquid.

Which of the following is neutrally charged? A) an ion B) a compound C) an electron D) a proton

The type of antimicrobial drug that would be least toxic to humans is a drug thatA) Inhibits protein synthesisB) Disrupts the cytoplasmic membraneC) Inhibits nucleic acid synthesisD) Inhibits cell wall synthesis

populations around the globe. If you were a scientist studying this fungus and wanted to know if it could infect a new frog species, how would you conduct your experiment?

Pregnancy comes with a unique set of diet and lifestyle guidelines. Some substances are particularly beneficial for the mother or baby, others are harmful, and some should be used with caution. Drag the appropriate items to their respective bins.

This type of galaxy gets its name from its characteristic oval shape

How are embryonic stem cells different from adult stem cells?