How are the nucleotides joined together to form the dna chain? what joins the middle? what joins the sides?

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles

Which describes the habitat of a frog?