You cannot blank or blank a pure substance by physical changes. it must go through a blank change in order to break down into different blank.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation: