What is centromere? How does the position of centromere form the basis of
classification of chromosomes? Support your answer with diagrams showing
the position of centromere on different types of chromosomes.

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems