Every person has their own part to play or if you want to get scientific then a niche. And if somebody doesn't do their job then it could slow everyone else down. Maybe I don't fully understand the question, But I hope its right.
Thicker Skin, Fur, More Fat Content
Answer:
Student who might want to become cheerleader
Explanation:
Answer:
structures that preform many jobs in cells :)
Bristles on a crayfish help them catch food
