2. How many strands of nucleotides make up a DNA molecule? a. One strand
b. Two strands
c. Three strands
d. Four strands
I

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d

Oak and maple trees, chipmunks, white-tail deer, and black bears emerging from hibernation are all organisms that may be found in which biome