Explanation:
Access to a fresh water supply is affected by the following factors.
Climate. Low levels of rainfall and high temperatures lead to water deficits . ...
Geology. Rainfall flows down to the rocks beneath the ground. ...
Pollution. ...
Over-abstraction. ...
Limited infrastructures. ...
Poverty. ...
Politics. ...
Impacts on water insecurity.
Answer:
C)Producing certain abnormal protiens
Explanation:
Mutations in HTT gene causes Huntington disease. The HTT gene provides instructions for making a protien called huntingin. This protien plays an important role in the neurons of brain. Thus as the gene coding for this protien is mutated ,abnormal protien is synthesized.
Anabolism is synthesis of large molecules from smaller ones. Opposite is catabolism. In this case, however, the answer is c.
<span>c) use a systematic method to name, organize, and show relationships among species.
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Answer
→ to lose sensation,
→ motor control
Explanation:
Anatomically the spinal cord is made up of two roots, the Dorsal roots or the posterior roots where motor or efferent neuron leaves the spinal cord to innervate the skeletal muscles, trunks and the Ventral root or anterior roots where the afferent or sensory neuron convey input signals to the spinal cord from the the receptors.
Polio virus usually destroyed the nucleus of motor neurons, in the ventral roots of the spinal cord. its inflamed these cells, leading to death, The death leads to consequent degeneration at the site of inflammation, and progressive spread of this to other segments of the nerve fibre. This is called Wallerian Degeneration. Thus mechanisms of generation and transmission of action potential in these motor neuron is inhibited.
Consequently, motor output signals by the efferent neuron leaving through the dorsal roots is disrupted, and blocked . Thus effectors-muscles of limbs,trunks, are no longer innervated and stimulated, by efferent responses from the spinal cord and the brain, thus leading to loss of sensation and motor control.
With muscles redundancy, from lack of stimulation, muscles cells begin to waste away(muscle atrophy), and not able to control by the victim.This is paralysis.
