Im confused what the question is but can still help if u comment, scientific method project?
Seedless plants are gymnosperms.
Their seeds are EXPOSED and NOT protected by fruits.
Hope this helps! :)
A heterogeneous mixture composes of non- uniform components, so the concrete would be the answer, because you can tell the components from one another.
Cryosphere, all Ice on earth, the gases melt the ice. Hydrosphere, once ice melts it turns into water. biosphere, lack of ice mean lack of habitat for some animal, penguins, polar bears etc.