12. suppose 117pt undergoes beta decay. the isotope that forms then also undergoes
beta decay. what is the final product?
(a) 1251 (b) 123au (c) 19hg (d) 127 t1

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

What are some natural processes that represent physical and chemical changes?