What happens inside muscles when they contract? Myosin heads attach to and move along actin-binding sites. Calcium produces contractions. Actin produces myosin and ATP. Calcium combines with ATP to produce sarcomeres.

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explanation:

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starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms