Which tissue is most likely to provide an adequate dna sample for genetic testing?

What are some aquatic organisms that live in cold water temperatures?

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?

Which organelle breaks down sugar molecules that supply energy to the cell ?