All living things are made up of carbon. this is because
a: carbon has the ability to form single bonds, double bonds, triple bonds, and rings and form large macromolecules.
b: carbon forms very unstable bonds with all elements except for itself.
c: carbon can only form small chains of macromolecules.
d : carbon likes to make 6 bonds with many other kinds of elements and form large macromolecules.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

a. an idea which cannot be disproven!

explanation:

it is because according to the process , scientific inquiry is a process with many steps because each step occurs to the scientist and if you just skip a step there would be no steps to scientific inquiry.