Question

During vertebrate development, the principle of induction is illustrated by:

• A. The presence of a notochord beneath the ectoderm results in the formation of a neural tube.
• B. A neuron synapses with another neuron via a neurotransmitter.
• C. The neural tube develops into the brain, the spinal chord, and the rest of the nervous system.
• D. Secretion of TSH stimulates the secretion of the hormone thyroxine.
• E. None of the above.

Answer 1

The correct option is A The presence of a notochord beneath the ectoderm results in the formation of a neural tube.

According to the principle of induction in vertebrate development, during the early development of tissues in a multicellular organ, one group of cells can lead to the establishment of developmental pathways for other responding tissues. Amongst the examples given, the statement that is in accordance with this principle is that the presence of a notochord beneath the ectoderm results in the formation of a neural tube.

So, the correct answer is 'The presence of a notochord beneath the ectoderm results in the formation of a neural tube.'.