Imagine you have a system where the lateral inhibition is mediated by inhibitory glycinergic interneurons. (Glycinergic interneurons are neurons that use glycine as the neurotransmitter.) These interneurons make synapses onto the axon terminals of the secondary neurons. You add strychnine to the system. Strychnine is an exogenous antagonist of glycine receptors. What do you expect to happen when you add strychnine to this system?
a. The resolution of the secondary neurons will increase.
b. The resolution of the primary neurons will decrease.
c. The resolution of the tertiary neurons will decrease.
d. The resolution of the tertiary neurons will increase.
e. The resolution of the primary neurons will increase.

d) center of the mid-ocean ridge

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steckh986

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.