What is the difference between a heterogeneous mixture and a homogeneous mixture? * 1) You can not see the parts in a heterogeneous mixture, but you can in a homogeneous mixture.
2) You can see the parts in heterogeneous mixture, but you can not see them in a homogeneous mixture
3) Homogeneous mixtures may settle out while heterogenous mixture never settle out.

The answer is option 2) You can see the parts in heterogeneous mixture, but you can not see them in a homogeneous mixture.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

there is none because earth is stationary and flat.