It’s a plus-plus, also known as mutualistic relationship. Our intestines provide a habitat for the good bacteria and in return the bacteria fend off bad bacteria from harming us.
Cells are the smallest unit of live so basically what they do is take in nutrients and provide structure
D is the answer cause
A genome is an organism's complete set of DNA including all of its genes. Each genome contains all of the information needed to build and maintain that organism. This is the largest in the given options.
Chromosomes are the threadlike structures located inside the nucleus of animal and plant cells.
The building blocks of nucleic acids are the nucleotides.
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.
Thus, the correct answer is option (D), 'Genome, chromosome, gene, nucleotide'.