LS 1.7: DOK 2- There are advantages to both sexual and asexual reproduction. Which of the explanations below describes the most likely advantage of sexual reproduction? A. Sexual reproduction increases the chance that an offspring will receive a harmless mutation from its parents.
B. Sexual reproduction ensures that all the parents' genes are passed on to the next generation.
C. Sexual reproduction can produce large numbers of offspring in a short amount of time. D. Sexual reproduction results in more variation among offspring, which may help them adapt better to changing environments.​

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)