the choroid plexus a. cushions the brain b. forms the cerebrospinal fluid c. is another name for the ventricles d. protects the brain from infection

b. forms the cerebrospinal fluid

Explanation:

Choroid plexuses are part of the central nervous system and are located near the ventricles. They have as their main function the secretion of cerebrospinal fluid, which is the damping fluid for the cerebral cortex and spinal cord. Unfortunately, choroid plexuses are susceptible to the appearance of tumors, but most of these tumors are benign and can be surgically removed.

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'