True... Everything needs energy.
64 codons
The genetic code includes 64 possible permutations, or combinations, of three-letter nucleotide sequences that can be made from the four nucleotides. Of the 64 codons, 61 represent amino acids, and three are stop signals. For example, the codon CAG represents the amino acid glutamine, and TAA is a stop codon.
Average speed of the car
10km/(15min/60)
=40km/h
I'm not quite sure how to answer this because it is not a question.
Assuming it's only salt water, it should be 85%