Biology 12 Chapter 21 Development and Aging -

Biology 12 Chapter 21
Development and Aging - 7

1. On which month does neurulation begin during development?

a) 3rd
b) 2nd
c) 1st
d) 4th

2. Developing notochord stimulates overlying ectoderm to from…………..?

a) Neural groove
b) Neural plate
c) Neural tube
d) Neurula

3. Central cells of neural plate form a depression called……….?

a) Neural groove
b) Neural tube
c) Neural plate
d) Neurula

4. Fusion of superior margins of neural folds form……………?

a) Neural groove
b) Neural tube
c) Neurula
d) Neural plate

5. From where does brain develop?

a) Anterior
b) Posterior
c) Dorsal
d) Ventral

6. Brain waves can be recorded in which month?

a) By the end of 2nd month
b) By the end of 1st month
c) By the end of 3rd month
d) By the end of 4th month

7. How many brain vesicles develop by the ned of 1st month?

a) 4
b) 5
c) 2
d) 3

8. Which one refers to 4th germ layer?

a) Neural groove
b) Neural plate
c) Neural crest
d) Neural tube

9. In which cell types the Neural crest develops?

a) All of these
b) Peripheral nerves
c) Teeth
d) Skull bones

10. When does embryo call as foetus?a) By the start of 3rd month
b) By the start of 2nd month
c) By the start of 5th month
d) By the start of 4th month

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