What elements does combustion use to create a sensory experience?

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?