What cell structure is mainly responsible for releasing energy from food molecules in some single celled organisms?

Is it considered muscle s ennervation if sympathetic fibers innervate the vessels within the muscle?

Which of these best describes wde by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

Which is one example of a phenotypic change that is not genetic