What is cladistics? PLEASE HELP A. The Classification of living things according to generations stemming from a common ancestor
B. The classification of living things based on common physical characteristics
C. The classification of living things into seven major levels
D. The classification of living things based on their geographic range

The shift of a vehicle's weight around its center of gravity is known as

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

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.