<span>The afferent nerve fibres of the olfactory receptor neurons transmit nerve signal about odours to the CNS. From the olfactory mucosa (inside the nasal cavity), the nerve travels up through the cribriform plate of the ethmoid bone where the fascicles enter the olfactory bulb<span>. The olfactory</span> bulb is a structure which contains specialised neurones, called mitral cells and the nerve fibres synapse with those mitral cells, forming collections known as synaptic glomeruli. From the glomeruli, second order nerves then pass into the olfactory tract which runs to the CNS (</span>primary olfactory cortex).
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they were destroyed especially the houses because of how close they are build to the sea, in addition with the fact that the sea levels are rising
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incoming Paleoindians, the first Americans, who allegedly hunted them to extinction.
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hitchhiker effect
it is an exaptation
Explanation:
Adaptation is a property which occurs due to change in the environmental conditions of an organism. Some traits of organisms are not adaptation because sometimes the function of a trait changes due to evolution which we called exaptation. It also occurs due to hitchhiker effect, this effect occurs when the change occurs in the frequency of allele not due to natural selection but due to selective sweep with the nearby gene.
