Why is the surface of the organelle so twisty?

the winding structure of the ER results in a large membrane surface area that supports its function

Explanation:

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.