The right answer is false.
Lobotomy is a brain operation that cuts or alters the white matter of a brain lobe. It is now banned in many countries and is no longer considered a good practice in today's medicine.
The lobotomy was performed in psychosurgery with the aim of interrupting certain neural circuits to treat mental illnesses, schizophrenia, epilepsy and even chronic headaches before declining in the 1950s with the advent of the first neuroleptics.
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Natural selection is a theory originally popularized by Charles Darwin. According to this theory, animals in the natural environment change over time as beneficial traits are preserved, and traits which do not advance the species are slowly weeded out. Natural selection, a concept first theorized by Charles Darwin, is the adjustment of genes throughout generations based on factors that help it survive. Sometimes this is survival of the fittest or the organisms that are better suited to the environment in other ways.
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About 95 percent of the time, Down syndrome is caused by trisomy 21 — the person has three copies of chromosome 21, instead of the usual two copies, in all cells. This is caused by abnormal cell division during the development of the sperm cell or the egg cell.
Mutations in these genes can produce new or altered traits, resulting in heritable differences (genetic variation) between organisms. ... One definition of a species is a group of organisms that can reproduce with one another and produce fertile offspring.
