The brain and spinal cord are derived from which germ layer?
- AEctoderm
- BMesoderm
- CEndoderm
- DEpidermis
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View SolutionSelect the correct pairs of germ layers and their derivatives from the following; and choose the correct option given below.Germ layer Derivatives $a$. Mesoderm All types of muscles of body $b$. Ectoderm Iris Muscles and Ciliary Muscles $c$. Endoderm Lining of Middle ear $d$. Ectoderm Adrenal cortex and Medulla $e$. Mesoderm Sclera and Choroid layer of eye
| Germ layer | Derivatives |
| $a$. Mesoderm | All types of muscles of body |
| $b$. Ectoderm | Iris Muscles and Ciliary Muscles |
| $c$. Endoderm | Lining of Middle ear |
| $d$. Ectoderm | Adrenal cortex and Medulla |
| $e$. Mesoderm | Sclera and Choroid layer of eye |
Primary ectoderm during gastrulation develops from . . . . . . .
Following changes can be seen in the first trimester of pregnancy,$EXCEPT$:
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