Which are examples of cartilaginous fish? seahorses, skates, hagfish
skates, rays, sharks
lampreys, hagfish, pufferfish
goldfish, tuna, salmon

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?