3 years ago

Genetic drift models?

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Genetic drift is a process in which allele frequencies within a population change by chance alone as a result of sampling error from generation to generation. Genetic drift is a random process that can lead to large changes in populations over a short period of time.

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The meninges is a three-layered, membranous covering of the brain and spinal cord. Read the descriptions below and then click an

AleksAgata [21]

The question is incomplete as it does not have the options which have been provided in the attached file.

Explanation:

1. Dura mater: the dura mater is the most superficial layer which is characterized by the folds. The dura mater forms the walls between the hemisphere of the brain that is between right and left halves of the cerebellum. The structure present in the dura mater is tentorium cerebelli and super sagittal sinus.

2. Pia mater: the deepest layer present which is adhered to the tissues of the brain. The cortical gyri blood vesicle are superficial to the pia mater.

3. Arachnoid mater: the middle layer which is characterised by transparent and gelatin-like appearance.