Q: What is the connection between the two hemispheres of the brain called? Choices: - cerebral cortex - spinal cord - cranial septum - corpus callosum A:
corpus callosum

Q: What substances affect the brain and influence how a person feels, thinks, or acts? Choices: - H2 blockers - primeval drugs or drugs - amphetamines - psychoactive drugs or drugs A:
psychoactive drugs or drugs

Q: Q: Fertilization is the union of a sperm and egg, resulting in the formation of what? Choices: - a cytoplasm - a nuclei - a bacteriophage - a zygote A:
A: a zygote

Question: Q: Mendeleev organized what basic units into rows and columns? Choices: - solutions - compounds - animals - elements A:
Answer: elements

*Question*
Q: When alternating primary current passes through coil p, it does what to the iron core? Choices: - electrilizes it - creates it - heats it - magnetizes it A:
**Answer**
magnetizes it

Q: Q: What is a random change in an organism's genes? Choices: - meiosis - infection - accumulation - mutation A:
A: mutation