Which description best explains Watson and Crick's DNA model?

A.

DNA is a single–stranded molecule that has nitrogenous bases toward its exterior.

B.

DNA is a double helix made of two strands linked together with hydrogen bonds.

C.

DNA is a double helix that contains nitrogenous bases toward its exterior

Interactions between organisms and their environment impact the organism’s overall population. the jaguar panthera onca is the largest cat in north america. it is found in areas across the southwest, including arizona, new mexico, and texas. it is a carnivore that has powerful jaws and sharp teeth and preys on fish, turtles, tapirs, and many smaller mammals. which shows the relationship between the jaguar and turtles?