input: OPTIONS:
- clouds
- cell
- DNA
- ovum
- HIV
- magnified
- h2o
- RNA Now, answer this question: You are presented with the quiz "what is so small it can only be seen with an electron microscope?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "viruses are so small that they can be seen only with an electron microscope" and "where most viruses are DNA, HIV is an RNA virus". So, what's the best answer to the question?
A:
output: HIV
You are presented with the quiz "Allergic reactions can be caused by" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "antibodies are large, Y-shaped proteins that recognize and bind to antigens" and "allergic reactions are caused by substances called antigens". So, what's the best answer to the question?

OPTIONS:
- animals
- smoking pipes
- Sulfur dioxide
- Chemical energy
- fur and fat
- antibodies
- smoking tobacco
- Pesticides

Answer: antibodies
Problem: OPTIONS:
- animals
- Conifers
- Most plants
- it needs them
- graptolites
- fur seals
- centrioles
- sensory neurons
Q: You are presented with the quiz "What are organelles involved in mitosis?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "centrioles are organelles involved in cell division" and "mitosis is cell division". So, what's the best answer to the question?
Answer: centrioles
Problem:OPTIONS:
- a hydraulic system
- rays or beams
- deoxyribonucleic acid
- kinetic energy
- encoded information
- sensory neurons
- circulatory systems
- Loud noises

You are presented with the quiz "A doorbell converts _ into sound" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "adoorbell converts electrical energy into sound" and "electricity is a kinetic energy". So, what's the best answer to the question?
****
A: kinetic energy
You are presented with the quiz "A positive impact on the environment can be from:" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "recycling has a positive impact on the environment" and "recycling is the reuse of material". So, what's the best answer to the question?
OPTIONS:
- creating plastics
- drilling for oil
- reusing materials
- lowered energy cost
- mining
- water conservation
- Time and energy
- transportation technology
reusing materials
You are presented with the quiz "What can occur when menstruation stops?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "menopause occurs when menstruation stops occurring, usually in middle adulthood" and "another menopause discomfort is vaginal dryness". So, what's the best answer to the question?
OPTIONS:
- hospitalization
- Dehydration
- Localized damage
- sweating
- Vaginal dryness
- turn to a doctor
- cigarettes
- Leptospirosis

Answer:
Vaginal dryness