Answer:
3. Second-order neuron cell bodies reside in the dorsal horn of the spinal cord.
Explanation:
The Anterolateral System, also called spinothalamic, carries information about pain, temperature, coarse touch or pressure, and itching and tickling sensations. This system mainly contains slow conduction fibers
The spinothalamic pathway can be subdivided into two: the neospinothalamic pathway the fibers project into the somatosensory cortex and the paleoespinothalamic pathway with projections at different points in the thalamus. The neospinotalamic pathway has the axons of the first-order neurons that establish synapses on second-order neurons, located in the dorsal horns of the spinal cord.
A vestigial organ, something that has yet to fall prey to evolution, but no longer serves a purpose, or the purpose it used to serve.
Answer:
Option A, Pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction
Explanation:
Genetics variation allows as organism to evolve in a way to be able to cope up with the existing or changing environmental condition. Now, a Pantala flavescens undergoes sexual reproduction, thus only this creature has the ability among all the given organism to evolve genetically and be able to survive in this environment. All the remaining organisms reproduce asexually and hence there is no variation with in them and hence it would be difficult for these organisms to cope up with changing environment.
Hence, option A is correct.
<span>A person must inherit two copies of a defective CF gene -- one copy from each parent -- to have the disease. People who inherit only one copy are considered CF carriers and do not have the disease, but they can pass their copy of the defective gene on to their children.</span>
