Which characteristic do plants, people and flatworms share?
a). they exchange gases with the environment
b). they all have digestive systems that break down food
c). they all undergo photosynthesis
d). they all use a muscular system for movement

Option A

Explanation: Plants, flatworm and people share the similar characteristics as they exchange gases with the environment.

The exchange of gases from the environment takes place differently in different types of organisms.

In case of flatworm it takes place through its skin, plants exchange gases through their leaves and animals respire through lungs.

The common character shared by all the three organism is exchange of gases.

the peripheral nervous system or pns contains the nerves, which leave the brain and the spinal cord and travel to certain areas of the body. the peripheral nervous system's main job is to send information gathered by the body's sensory receptors to the cns as quickly as possible.

protein synthesis is an example of feedback mechanism which in homeostasis