Look at the H-R Diagram. Which star is sort of cooll, dim (not too much light) and red? Betelguse

Procyon B

Sirius B

Barndard's star

Contrast how pollination is different among gymnosperms and angiosperms.

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 label correctly identifies what x represents in the concept map?