Which Result Did Hans Spemann Get When He Bisected a Salamander

question 175

Multiple Choice

Which result did Hans Spemann get when he bisected a salamander zygote, isolating the gray crescent in one of the two resulting cells?

• A) Both halves developed into complete embryos.
• B) The half with the gray crescent developed into a belly piece, and the other half formed a complete embryo.
• C) Neither half developed.
• D) The half with the gray crescent developed into a complete embryo, and the other half formed a belly piece.
• E) The half with the gray crescent developed into a complete embryo with a secondary embryo attached to its belly region.

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Definitions:

Plasticity

The brain's ability to change and adapt as a result of experience or following injury, indicating flexibility in learning and memory.

Synaptic Pruning

The process by which extra neurons and synaptic connections are eliminated in the brain to increase the efficiency of neuronal transmissions, crucial for healthy brain development.

Developmental Plasticity

The ability of an organism to change its development in response to environmental conditions, a key concept in developmental biology and psychology.

Cerebral Cortex

The outer layer of the cerebrum in the mammalian brain, involved in various high-level brain functions such as thought, memory, and consciousness.