Insects obtain oxygen through which are small abdominal holes that lead into tracheal tubes called tracheae that branch out into smaller tubes called tracheoles. from there, oxygen diffuses into body cells.

alveoli

spiracles

stomata

Oxygen travels to insect tissues through tiny openings in the body walls called spiracles, and then through tiny blind-ended, air-filled tubes called tracheae. Therefore, insects obtain oxygen through the spracles, which are small abdominal holes that lead into traecheal tubes called tracheae that branch into smaller tubes called tracheoles. From there, oxygen diffuses into body cells.

Ribonuclease activity is a type of nuclease that catalyzes the degradation of rna into small components.