The arrows in the diagram below indicate the movement of materials into and out of a singlecelled organism?

Question

http://i123.photobucket.com/albums/o305/haterstheygonhate/abio4.gif

The movements indicated by all the arrows are directly involved in...

1.the maintenance of homeostasis

2.photosynthesis, only

3.excretion, only

4.the digestion of minerals

Answer 1

I guess 4. Why is this question here? this is pure biology and has nothing to do with Geology.  There is a biology section where you can get a bundle of good answers from.

Answer 2

3

Answer 3

O2 in and CO2 out indicates respiration

The others indicate digestion