Q: You are presented with the quiz "What uses semiochemicals in urine to mark territory?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "male dogs use pheromones in urine to mark their territory" and "pheromones are a sub-category of semiochemicals". So, what's the best answer to the question? | OPTIONS:
- koalas
- bacteria
- humans
- dogs
- bears
- cats
- the Sun
- rabbit
A: dogs

Q: You are presented with the quiz "How do leaves keep animals from getting cold? " But you don't know the answer, so you turn to your teacher to ask for hints. He says that "preventing the transfer of heat from an organims 's body causes that organism to keep warm" and "leaves can keep animals warm". So, what's the best answer to the question? | OPTIONS:
- can be worn as clothes
- protect them
- adapt to coolness
- heat with the sun
- used to start fires
- hard outer covering
- preventing heat transfer
- A transportation fuel
A: preventing heat transfer

Q: You are presented with the quiz "What is created when a doorbell is pressed?" 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 "perception of sound Sound is a wave". So, what's the best answer to the question? | OPTIONS:
- an object
- particles
- heat
- energy
- a wave
- courtship
- aura
- colors
A: a wave

Q: You are presented with the quiz "What are the ova and spermatozoa of plants?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "pollen consists of tiny grains that are the male gametes of plants" and "examples of gametes are ova and spermatozoa". So, what's the best answer to the question? | OPTIONS:
- Dead leaves
- Most plants
- Pollen grains
- important habitats
- Deep roots
- more abundant
- Chemical energy
- Wet soil
A: Pollen grains