Answer:
64
Explanation:
A codon is a group of three nucleotide sequence in a mRNA that specifies a particular amino acid acid. There are only four nucleotides composed of the four nitrogenous bases viz: Adenine, Guanine, Cytosine and Thymine/Uracil.
A codon is composed of only three of these nucleotide bases at a time. Hence, considering the number of nucleotide bases that can make up one codon and the 4 nucleotide bases, there can only be 4^3 = 64 combinations of the four nucleotides. This means that there are 64 possible codons.
One type of observation that the scientist use is the scientific method and the independent variable and dependent variable
Genetic engineering is the direct manipulation of a specific gene. I would use it in this scenario
Answer:
C. Age of Mammals
Explanation:
Cenozoic is derived from Greek word meaning NEW LIFE. The Cenozoic Era witnessed the disappearance of Dinosaurs which made Mammals to thrive and giving a new life to mammals. During this early stage as new life is beginning, majority of the animal species are relatively small comprising of the small mammals, birds, reptiles and amphibians.