What is a stem cell?

a. a cell from which a new cell that has a specialized function is formed.
b. a mature egg cell that is capable of forming a new organism.
c. a cell that has half the number of chromosomes of a parent cell.
d. a specialized cell in the skin that identifies pathogenic organisms.

Solutions to environmental problems in europe must

Toorale man murder mystery < - your lab link 1. how was the toorale man found? 2. what did archaeologists learn about the burial? why is the burial important? 3. what information were the scientists able to learn from the skeleton itself? 4. why is the question of whether the injuries came from a stone or steel weapon important? how could scientists distinguish between the different types of weapons? 5. what did the carbon dating and soil testing tell scientists about toorale man? why are the dates interesting for scientists?

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.