1. Massive star: elements made in this stage. 2.how does the brightness/luminosity change throughout the cycle of a massive star?
3.how does the brightness/luminosity change throughout the cycle of an average star?

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Amoeba sisters video recap pedigrees

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.