Ineed some serious with these questions

question 4:  lipids provide  the energy for metabolic processes. serve as reserve energy of the body. so id say youre answer is d just because it says the "reserve".

question 5:

Nucleic acids / nucleotide's.

carbohydrates / monosaccharide's.

Proteins / amino acids.

Lipids / glycerol and fatty acids.

question 6:  i dont know this one sorry

question 7:

1.  nucleic acid

2. lipid

3. protein

4. carbohydrate

question 8: i dont know sorry

hope this helped even though i didnt do much T^T

have a good day

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.