Question

why does organisms need control and coordination

Answer 1

An  organisms has to carry out various life processes like growth,reproduction,sensitivity,nutrition,excretion etc..In order to maintain  all these activities in a balance it needs a controlling and coordinating system.In humans,nervous system and endocrine involves in this control and coordination.

Answer 2

Answer:

• Each kind of change in the environment evokes an appropriate movement in response by a living organism.
  for eg: when we want to talk to our friends in class, we whisper rather than shouting loudly.
• Clearly the movement to be made depends on the event that is triggering it.
• Therefore, such controlled movements must be connected to the recognition of various events in the environment, followed by only the correct movement in response.
• In other words, living organisms must use systems providing control and coordination.

(hope it proves helpful. points taken from the chapter 7 control and coordination of science class 10)