Which of a cell's organelles releases energy stored in food? a. chloroplasts b. mitochondria c. er (endoplasmic reticulum) d. lysosomes

The correct answer is Mitochondria.

Cells use oxygen to release energy stored in the form of glucose. Most of the energy used by the body is released by cellular respiration. This cellular respiration takes place in the organelle called mitochondria. It is present in both plants and animals so both of them release energy by the help of cellular respiration. It releases energy in the form of ATP (adenosine tri phosphate) and regulates the metabolism of the body.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

we would need to see the picture to answer it