The process in which substances enter the cell without the use of energy is called O passive transport
O active transport
O exocytosis
O endocytosi

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere