In dna, which base pairing is a watson-crick base pairing? choose 1 choose 1 (choice a) a cytosine and adenine (choice b) b uracil and thymine (choice c) c thymine and guanine (choice d) d guanine and cytosine

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Which could be a pathway of food through an ecosystem

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations