If it has a nucleus is it autotrophic or heterotrophic

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?