Problem: OPTIONS:
- the diaphragm
- the heart
- the brain
- the lungs
Q: Q: What is the main organ required for respiration in mammals? A:
Answer: the lungs

Problem:OPTIONS:
- tumors
- neutrophils
- cancer
- lymphocytes

Q: What is it in bone marrow transplants that may cause a graft versus host reaction? A:
****
A: lymphocytes

Q: What substances that primarily comprise plasma membranes form a bilayer? A:
OPTIONS:
- amino acids
- enzymes
- steroids
- phospholipids
phospholipids

Q: A group of genetically identical individuals is called what? A:
OPTIONS:
- brother
- replicant
- a man
- a clone

Answer: a clone

Question: Q: What is the process of larva becoming an adult called? A:
OPTIONS:
- parthenogenesis
- synthesis
- evolution
- metamorphosis
Answer: metamorphosis

input: OPTIONS:
- chemical interaction
- chain reaction
- chemical reaction
- replacement reactions Now, answer this question: Q: What occur when elements switch places in compounds? A:
A:
output:
replacement reactions