The rungs or steps of dna are made up of which are attached to the sides or railings of dna, which are made up of

Aphids are tiny insects that feed on plants. ladybugs are to plants because they eat aphids. which type of organism are aphids in this scenario? co decomposers predators prey producers

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because