Why do very few trees exist in a grassland ecosystem?

a.
not enough heat

b.
not enough topsoil

c.
not enough sunlight

d.
not enough precipitation

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.