PLZ HELP i will give brainliest!! A disease resistance gene is a gene that either lessens the symptoms of a disease or helps an organism avoid getting the disease in the first place. Explain why the mutation to the CCR5 gene results in an allele that provides disease resistance.

/the trachea, commonly known as the windpipe

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.