Answer: In modern view, the origin of variation is mutation. Since Darwin stated that variation will occurs in the most useful part and is retained, most people don't use their left hands, if according to Darwin's theory, those left hands should be going to extinct by now.
If Darwin's theory of variation is acceptable, then dwarfs who always want to be giant, by stretching the body, would have become giant by now.
Darwin just had a general idea about variation, offsprings tends to change in appearance from the parents. But this variation is not in terms of usefulness of the body parts of the parents, it is in terms of Gene mutation of the parents in their offspring.
Explanation: Darwin's 1859 theory set out a theory of Evolution by natural selection to explain adaptation and speciation.
According to Darwin's theory, individual of one generation are qualitatively different from one another this is as a result of natural selection. But in modern science, this is as a result of Gene mutation.
Representatives from the 13 colonies came together to make a letter to send to the British
Encourage and strengthen bonds of solidarity between all indigenous and diasporan ethnic groups of African descent.
Answer:
Lesions
Explanation:
LESIONS can be defined as the process that occur when a person or an individual suffers any damage in which such damage leads to abnormal change in the tissue organ of that person and it is usually caused by disease or when the person suffer trauma as well as injury and it may as well occur in plants as well as animals although the common causes of this LESIONS can have causes that aren't due to underlying disease. such as birthmarks, or scars while the most common causes of skin lesions are injury, aging, infectious diseases among others.
Examples in a situation where a perosn has severe diseases it can cause skin lesions.
Therefore based on the scenario some researchers remove parts of the brain in animals to observe changes in behavior which was why the study rely on LESIONS.
