What's the name for Earth's supply of water?
O
O
A. Hydrosphere
B. Biosphere
O
C. Atmosphere
O D. Geosphere

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?

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

What problem would a person most likely have if her kidney did not work correctly?