My guess would be B but it it is not than A is my other answer that i think it is
Answer: An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.
Explanation:
An example of Nuclear Fusion happening naturally, is the core of the Sun. The core of our Sun is 27 million degrees Fahrenheit (15 million degrees Celsius). Hydrogen atoms are constantly being compressed and fused together to create helium through Nuclear Fusion.
The mechanism is Natural Selection
The correct answers are:
2) Peptide bonds form from nucleophilic attack by an electron pair on an alpha - amino nitrogen atom on an alpha - carboxyl carbon atom of another amino acid and
4) Peptides are polymers of amino acids.
A peptide bond is an amide type of covalent chemical bond. It is formed between two amino acids: C1 (carbon end) of one alpha-amino acid and N2 (nitrogen end) of another. Peptide bonds are the basis for the formation of a peptide chain and consequently protein. Formation of peptide bond is a condensation process, meaning that when two amino acids combine and link, water molecule is released and dipeptide is a product of that reaction.