Most organisms are Diploid, and as a result, they will have received 2 copies of the chromosomes, or sets of chromosomes, from both their parents. This they will have 2 sets of Genes that will perform almost exact same process, except with different phenotypes.
These chromosomes need to be homologous, in order for new alleles and other genetic combinations to be made.
Oncovirus is the virus that is studied
Explanation:
Oncovirus are the tumour causing viruses, which has been a dominant in causing leukaemia and also solid tumours in lower species. Oncovirus grows clumps of cells in the upper layer of the original cell. Transformation of cells as well as the tumour formation in experimental cells are induced by the oncoviruses. viruses remain unique form one another because of their nucleic acid, morphology, mode of replication, host range and type of antigens induced in the tumour or induced cell.
First they don't use oxygen, plants use the CO2 in the air and release oxygen out into the air after the plant used up the CO2
i think that -5 will be the answer