The best answer to the question above would be letter d. The sentence presented which is 'Researchers helped further the biological perspective when they demonstrated that electrical stimulation of the brain could evoke emotional responses in animals.' demonstrates how new discoveries can influence perspectives.
A situation where friction would be desirable is rubbing your hands together to make them warm in the winter time.
Answer:
An adequate sample of a population for studies of natural selection should
be large enough to:
represent the genetic variation in the population
Explanation:
Radiation can actually affect the entire body, however it has a large effect of the bone marrow. Radiation is dangerous because too much can cause cellular depredation, this happens in environment that rapidly change like the bone marrow, which then interferes with blood cell production.
