How many pairs of chromosomes do humans have?

Witch type of microscope is used to view very small cell components like proteins and dna?

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 of the following forest management practices is best for reestablishing areas of forest?