Question

Ectoderm: endoderm : : ......... : .............

• A. Heart : stomach
• B. Retina: lungs
• C. Skeletal muscles : liver
• D. Skin: Stomach muscle
• E. Thyroid: uterus

Answer 1

Answer: (B)

Retina: lungs

Ectoderm and endoderm are the outermost and innermost germinal layers which appear on animal embryo during early stages of development.

1. Ectoderm gives rise to hair, epithelial layer of various tissues and organs (including epidermis of skin), nails or hooves, retina of eyes, etc.
   
2. Endoderm gives rise to gut tube including stomach, intestines, cecum, pancreas and liver along with other organs like lungs, thymus, prostate, etc.

So, the correct answer is 'Retina: lungs'.