Which of the following could be an observation in an investigation? a. oil is not a good solvent for salt
b. the oil did not dissolve the salt sample
c. with enough mixing, the oil will probably dissolve salt
d. oil deep beneath the surface of the earth could leach salt from the rocks

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?

Which of the following is an abiotic factor in an ecosystem? a. bacteriab. airc. niched. grass(abiotic=non-living) me !

Based on the diagram, which of the following best describes ways in which the physical appearance of h. neandertalensis and h. sapiens differ?