C.All living things are made of the same elements
The carrying capacity in an environment is the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water, and other necessities available in the environment.
The photoreceptors would be your eyes, chemoreceptors skin, olfactory for nose and mechanoreceptors for obviously tongue hope this helps.
You would try to study the nucleus and the organelles of the organism to classify it
