Think of it this way:
DNA inside cells store all the genetic information on a person's looks, eye colour, hair colour etc. It makes them unique. The analogy of being like books in a library basically suggests that in a library there is so much information and every book is different with different knowledge... That's basically what DNA is; millions of different information things.
Answer is D.
Waste products from metabolism are carried by the circulation to the kidneys, which filter them out if the blood to be excreted in urine.
False because it's using energy to do the work. one way to gain energy is by making it. but yet again this is my thought but like i said it's false.
The amount of energy before a process occurs is equal to the energy after the process occur.
Answer:
B
Explanation: They make up most of a cell membrane
