Membranes that surround the brain and spinal cord are called a. hydrocephali b. ventricles c. csf d. meninges

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

9. wind power creates pollution. water air soil noise