You are presented with the quiz "What type of creatures have sexual reproduction as part of their life cycle?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "arthropods have a life cycle with sexual reproduction" and "insects are the largest group of arthropods". So, what's the best answer to the question?
OPTIONS:
- plants
- insects
- proteins
- ducks
- animals
- gametes
- prions
- fungi

Answer: insects

You are presented with the quiz "Freshwater biomes contain water that contains little to no what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "freshwater biomes have water that contains little or no salt" and "another name for salt is sodium". So, what's the best answer to the question?
OPTIONS:
- cations
- Acids
- Nutrients
- sodium
- Pollution
- animals
- plants
- water

Answer: sodium

You are presented with the quiz "Which parts do female duckbill platypus lack?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "female monotremes lack a uterus and vagina" and "monotremes include the duckbill platypus". So, what's the best answer to the question?
OPTIONS:
- uterus and vagina
- Chlorophyll
- Epidermis
- a cuticle
- epidermis and dermis
- four limbs
- fur and fat
- critical organs

Answer:
uterus and vagina