why must you calcuate a weighted average (using the precent abundance) when determining the average atomic mass of an element?

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants,the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions