If you start with 100 grams of radioactive carbon, and 50 grams remain after 5730 years, what is the half-life of the isotope?

Photosynthesis converts solar energy into what type of energy?

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms