What proportion of all species that ever lived has become extinct? a. less than 1 percent c. more than 99 percent b. approximately one-half d. 100 percent?

Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other

*a mastectomy is the surgical removal of one or both breasts, either partially of fully. an oophorectomy is the surgical removal of an ovary or ovaries.analyze a woman’s risk of dying of cancer if she carries a mutated brc1 gene.how do heredity and inheritance relate to the data presented in these charts? what data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries? what does the age at diagnosis tell you about the mutation? explain how breast-cancer genes are still present in the population, despite cancer-related surgeries and deaths.