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Biology 12 Chapter 21
Development and Aging - 6
1.
What are the primitive tissues for all body organs?
a) Embryonic disc
b) Blastodisc
c) Germ layers
d) Primitive streak
2.
Which layer does develop into nervous system and skin epidermis?
a) Mesoderm
b) Ectoderm
c) Endoderm
d) None of them
3.
Endoderm forms epithelial lining of……………. System?
a) All of these
b) Digestive
c) Respiratory
d) Urinogenital
4.
Endoderm does not form……………. System?
a) Digestive
b) Respiratory
c) Nervous
d) Urinogenital
5.
Which germ layer develops into brain and spinal cord?
a) None of them
b) Endoderm
c) Mesoderm
d) Ectoderm
6.
Which is the third major phase of embryonic development?
a) Neurulation
b) Cleavage
c) Gastrulation
d) Organogenesis
7.
Which is the first major event in Organogenesis?
a) Gastrulation
b) Neural crest development
c) Neurulation
d) Primitive streak development
8.
From where does notochord derive?
a) None of them
b) Endoderm
c) Ectoderm
d) Mesoderm
9.
From where do somites derive?
a) Endoderm
b) Ectoderm
c) Mesoderm
d) None of them
10.
Neural crest cells form components of……………….system?
a) Central nervous
b) Respiratory
c) Peripheral nervous
d) Urinogenital
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