Germ Layers

Q.

The words diploblastic and triploblastic refer to _____ and _____ germinal layers respectively.

1. 2 & 3

2. 3 & 2

3. 2 & 1

4. 1 & 2

Q.

The animals possessing the following types of germ layers (a and b) are _____________and _____________ respectively.

1. diploblastic, triploblastic

2. triploblastic, diploblastic

3. diploblastic, diploblastic

4. triploblastic, triploblastic

Q.

Diploblastic animals possess

1. Differentiated ectoderm

2. Undifferentiated mesoglea

3. All of these

4. Differentiated endoderm

Q. Label the germ layers of a diploblastic organism.

1. Mesoglea
2. Endoderm
3. Ectoderm

Q. Pair them up!

1. Diploblastic
2. Mesoderm
3. Triploblastic
4. 2 germ layers
5. 3 germ layers
6. Middle layer

Q. Match the germ layers.

1. Outer germ layer
2. Two germ layers
3. Three germ layers
4. Inner germ layer

Q. Label the germ layers of a triploblastic organism.

1. Endoderm
2. Ectoderm
3. Mesoderm

Q. Human beings have

1. two germ layers - ectoderm and endoderm
2. two germ layers - ecotoderm and mesoderm
3. two germ layers - mesoderm and endoderm
4. three germ layers - ectoderm, mesoderm and endoderm

Q. Arrange the following in their order of occurrence.
I. Formation of the embryo.
II. Cells arrange themselves into different layers.
III. The zygote undergoes multiple cleavages.
IV. Formation of germ layers.

1. II, IV, III, I
2. I, III, IV, II
3. IV, II, III, I
4. III, I, II, IV

Q.

Differentiate between a diplobastic and a triploblastic animal.