Which characteristics of crystal faces define crystal systems?
angle
color
number
size
hardness

What’s this animal (picture is tagged) and where is it most likely to live, rainforest or desert?

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?