Answer:A calcareous, spiny endoskeleton of plates or ossicles
A water-vascular system
Pedicellariae
Dermal branchiae
Basic penta-radial symmetry
Explanation:
Diffusion across the alveoli
The answer should be all of the above, if it is not then the answer is A dichotomous key can help classify an unknown organism.
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Answer:
ATP, Mitochondria, Cellular respiration.
Explanation:
The Krebs cycle of, cellular respiration, in the mitochondria results to the an accumulation of protons in the inter-membrane space of the organelle. This proton motive force is harnessed in the electron transport chain by ATP synthase to generate ATPs.
