Structure of Teeth

Q.

1. The part of the tooth above gums is called as a crown.

2. The root of the tooth has fangs.

3. All the teeth have two fangs.

4. Different types of teeth have a different general structure.

Which of the above statements is true for human teeth?

1. 1 and 2.

2. 1 and 4.

3. 1, 2 and 3.

4. 1, 2 and 4.

Q.

Name the types of cells that make up the xylem and the phloem.

Q.

___ is the hardest substance in our body.

Q.

In the given figure of a human tooth. Identify the parts labeled and match them with their relative description and choose the correct option:

1. 1.i 2.ii 3.iv 4.iii

2. 1. iii. 2.iv. 3.ii. 4.i.

3. 1.iv. 2.i. 3.iii. 4.ii.

4. 1.iii. 2.ii. 3.i. 4.iv.

Q. Which one of the following plant tissue helps in the transportation of food?

1. Chlorenchyma
2. Parenchyma
3. Xylem
4. Phloem

Q.

In the given figure of a human tooth. Identify the parts labeled and match them with their relative description and choose the correct option:

1. 1.i 2.ii 3.iv 4.iii

2. 1.iii. 2.ii. 3.i. 4.iv.

3. 1. iii. 2.iv. 3.ii. 4.i.

4. 1.iv. 2.i. 3.iii. 4.ii.

Q.

Which of the following is false about the pulp in the human tooth?

1. It has an opening at the base of the root.

2. It is a bone-like structure.

3. It fills up the central space of the tooth.

4. It consists of blood capillaries and blood fibers.

Q.

Cement is a bone-like structure covering and fixing the root in position.

1. False

2. True

Q. Q1-Origin of enamel
Q2-Is enamel the hardest non living substance?
Q3- is it made of 95% calcium