A fellow student asks, "How is it possible that six feet of DNA can fit inside a single, microscopic nucleus of a cell?" Let's draw a parallel to help explain. If you were to unravel a ball of yarn, it would
probably be able to circle around your house (that's a long distance!). Use this comparison to answer
your fellow student's question.

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

the answer to your question is:

c. complementary base-pairing

that is true   : ) hope this you

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?