Fill in the blanks: 1. Finger-like projections in the walls of small intestine are called . 2. molar teeth are present in a human adult. 3. Plant food is rich in . 4. __ is the hardest material in o

Here are the answers to the fill-in-the-blanks questions:

1. Finger-like projections in the walls of small intestine are called villi.
2. Twelve molar teeth are present in a human adult.
3. Plant food is rich in carbohydrates (or fiber).
4. Enamel is the hardest material in our body.