Which part of the eye changes shape in order to regulate how much light enters?

Which statement best explains how cellular respiration maintain homeostasis in animals? it maintains body temperature by absorbing energy. it breaks glucose into energy required by the organism. it speeds up metabolism by making oxygen. it produces energy from hormones present in the organism.

What do animals wth echolocation have in common other than echolocation

How can you approximate the number of calories required to keep you in energy balance?