Answer:
[The recent activities of fossil fuel combustion has had adverse effects on the ozone layer]- B.
Answer:
Function:
mRNA: mRNA can be described serves intermediate molecule between the genetic material and the amino acids for the making of protein.
rRNA: It makes up the ribosomes along with the ribosomal proteins. Ribosomes are the sites where the process of translation occurs.
tRNA: The tRNA is involved in the bringing of the nucleotides to the ribososmes for translation.
Active transport requires energy because it moves molecules across a membrane to a region of lower to higher concentration which is often against their concentration gradient or has an obstructing factor.
