The particularly large pyramidal neurons of primary motor cortex are known as __________ cells

Approximately what number of Americans over the age of 12 have tried marijuana at least once

A) 94 million B) 62 million C) 38 million D) 4 million

What prenatal technique uses a long, hollow needle to extract amniotic fluid to examine the fetus's genotype?

a. amniocentesis b. chorionic villus sampling c. alphafetal protein d. ultrasound