During science class, while studying mixtures, you mix together table salt and sand. your teacher challenges you to separate the salt from the sand. what property could you use and how would you use it? a) solubility; add water to the mixture and dissolve the salt. b) density; the two will form two layers. scoop out the top layer. c) color; pick out one of the two solids by using color to guide you. d) particle size; pour the mixture through a paper filter to separate the two.

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

What tool do geneticists use to predict the outcome of genetic crosses? a. karyotype b. punnett square c. centrifuge