D. Potassium
The formula for phosphoric acid is H3PO4.
Potassium is K, not P.
Answer:
Thus, 50% of the population are are heterozygous carriers for this condition
Explanation:
Researchers have calculated that 22% of the population have Uner Tan Syndrome. This condition follows the recessive mode of inheritance.
22% have the condition = q² (genotypic frequency uu) = 22/100 = 0.22
using the formular p + q = 1, since q² = 0.22, q = √0.22 = 0.4690
Thus p = 1-q where is 0.4690 = 1-0.4690
p = 0.5310
Then p² = 0.5310² = 0.2820 = 28% (genotypic frequency of homozygous normal)
using the formula p² + 2pq + q² where 2pq is the genotypic frequency of the heterozygous carriers. Thus, we have
2 x 0.5310 x 0.4690 = 0.498 = 50%
Thus, 50% of the population are are heterozygous carriers for this condition
The right answer is B. back pain from the compressed nerves
Narrow cervical canal symptoms can range widely from no symptoms to gait and balance disorders to radiculaglia when there is foraminal narrowing associated with central narrowing. Discrete balance disorders may be early signs of myelopathy (posterior cords). Later, the patients suffer from proximal weakness and paresthesia of the four limbs, as well as disorders of the fine motor skills of the hands (do not manage to close buttons of shirt, difficulties with the writing, etc., on reaching the lower motor neuron). In more advanced stages, gait disturbances and even later sphincter control disorders may occur (upper motor neuron involvement).
Protista
A protist is any eukaryotic organism that is not an animal, plant or fungus. The protists do not form a natural group, since they sometimes exclude certain eukaryotes; but, like algae or invertebrates, they are often grouped together for convenience.
Absolute refractory period -
the period immediately following the firing of a nerve fiber when it cannot be stimulated no matter how great a stimulus is administered
