When you are looking at this you can see that there are tiny rocks. The tiny rocks are the ones that are light brown and dark brown. But what are the black things floating around the river?

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.