<span>The ischemic penumbra can maintain metabolic demand with marginal blood flow from collateral circulation for a maximum of 50% before increasing in size. A penumbra is the area where the flow of blood at about 25 - 50% can maintain normal metabolic demands for 6 - 8 hours only. When it continues to increase, the human cells will die and other neurological activity will be suspended causing the person to die slowly.</span>
Answer: Arenite
Explanation:
Arenite can be defined as the sedimentary clastic rock.
It is of the sand grain size.
It also comprises of matrix.
It is a metamorphosed sediment.
Arenite is formed by the erosion of the turbiditic re-deposition of the sands. It belongs to silicatic limestones.
Answer:
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Answer AND Explanation:
In man, codominance is seen in the inheritance of the ABO blood group alleles. the trait is controlled by more than two alleles for the same gene within a population. Such alleles are called multiple alleles and they occupy the same locus on homologous chromosomes.
Sickle cell anaemia is a disease of the humans which is inherited in an incomplete dominance way. The disease is transmitted through a recessive gene that leads to the synthesis of abnormal haemoglobin. In sickle cell anemia patients, haemoglobin A is entirely replaced by a different type called haemoglobin S.