What properties of a substance determine how that substance will react when combined with other substances

What is the term for the two sets of chromatids formed in the parent cell a.haploid b.diploid c.gamete d.tetrad

Time remaini 02: 50: 5 in the farewell speech, queen elizabeth's use of first-person point of view her to appear to be impartial and objective prevents her from addressing the audience directly allows her to share her personal thoughts and ideas, makes it seem as though she's observing from the outside, mack this and return save and evit

Are the layers of rock above and below the coal older or younger?