Which of the following is a factor in the increase of single-parent families in north america?

Occurs when the immune system attacks the body. lupus cancer sickle cell disease huntingtons disease

Why do you need two different circuits of blood vessels in your body?

Different plant and animal species have a great variety of body structures that them survive and reproduce. which of the following is also true? a. the individual cells of plants and animals cannot perform specialized functions. b. the individual cells of plants and animals function in very similar ways. c. the individual cells of plants and animals do not share any similarities. d. the individual cells of plants and animals do not contain genetic information. reset submit