actual question this time haha, which one is it because i thought it was temperature light, and water but light isn't there.

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.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.