Tissue regeneration is an emerging and exciting biomedical field. As a scientist, choose either an adult stem cell population or embryonic stem cells as a model system to develop a technique for growing artificial limbs in culture. Be sure to explain why you chose your particular stem cell and the drawbacks associated with the one that you did not choose for your experiments.

This rapid change in species that rarely leaves behind fossil evidence is referred to as

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water

which is an effect of short-term environmental changes? a) adaptation b) speciation c) extinction d) death (5 points)