Answer:
A
Explanation:
Cooperation is working together to achieve the same goal that is beneficial to the stakeholders. This is similar to mutualism that is a symbiotic relationship between two or more organisms of different species from which they all benefit. An example of mutualism is the interaction between fungi and algae that create lichen.
B. Chromosomes arranged in pairs according to the number of their genes
Pleiotropy just means that one gene is involved in many different phenotypes. An example of this is the the CFTR gene, which when mutated causes cystic fibrosis. Cystic fibrosis is a disease which is characterized by the perturbation of multiple systems, including the lungs, liver, pancreas, kidneys, and bowel. Epistasis is refers to the interaction of multiple genes (two or more loci) in determining a phenotypic outcome.
Explanation:
coding regions, called exons, which specify a sequence of amino acids.
non-coding regions, called introns, which do not specify amino acids.
regulatory sequences, which play a role in determining when and where the protein is made (and how much is made)