Which two human systems work together to provide cells with oxygen while removing carbondioxide waste products

In which terrestrial biome can you find trees that produce cones instead of flowers and needles instead of leaves? have trees that produce cones instead of flowers and needles instead of leaves. the latitudes in this biome have evenly distributed precipitation throughout the year. is it high or low

What advantages does a pedigree have over a written passage?

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?