Answer: three types of neuron are ;sensory,interneuron and motor neurons
Explanation:
The three types of neurons are
Motor neurons
Interneurons
Sensory neurons
Sensory neurons- it receives impulses and carry them from the sense organs to the spinal cord or brain
Interneurons-it connects sensory
Motor neurons-it interprets the impulse only in the brain and spinal cord
The hedgehog ligans activate it
D is the correct answer because the capital letter represents the dominant allele. All of the plants are pure bred. The first pea plant is short (tt) with purple flowers (PP). The second is tall (TT) with white flowers (pp). Therefore the cross is ttPP x TTpp