Asubstance that moves across a cell membrane without using the cells energy tends to move?

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

All of the following statements about enzymes are correct except: proteolytic enzymes are also known as proteases. pectin methyl esterase causes browning of cut fruit. cloud loss in orange juice is due to enzyme activity. proteolytic enzymes in fish cause tissue softening during storage.

Is it better to learn about animals through a book, or actually going to see them in real life?