Many cycles on earth involve the conservation of matter. which of the following is not a major cycle on earth?
a. air cycle
b. rock cycle
c. carbon cycle
d. nitrogen cycle

Which direction does the energy flow in this energy pyramid ?

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.

Compare and contrast your sells take in oxygen, water, and food. what is one waste product that leaves your cells?