Q: You are presented with the quiz "What has a woody stem covered with bark?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "trees have woody stems covered with bark" and "pines in general are popular trees". So, what's the best answer to the question? | OPTIONS:
- Aloe
- Cacti
- bamboo
- bushes
- Pines
- Ferns
- apple
- elms
A: Pines

Q: You are presented with the quiz "Burning wood is used to produce what type of energy?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "burning wood is used to produce heat" and "heat is kinetic energy". So, what's the best answer to the question? | OPTIONS:
- Light
- warmth
- potential
- Fuel cells
- food
- electrical
- mechanical
- kinetic
A: kinetic

Q: You are presented with the quiz "What don't arthropods have?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "arthropods are the largest phylum of invertebrates" and "invertebrates have no backbone". So, what's the best answer to the question? | OPTIONS:
- barnacles
- backbone
- Weight
- exoskeleton
- rights
- meaning
- Energy
- Energy.
A: backbone

Q: You are presented with the quiz "what does a diaphragm aid in?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mammals breathe with the help of a diaphragm" and "mammals have a diaphragm to aid in respiration". So, what's the best answer to the question? | OPTIONS:
- sweating
- movement
- excretion
- Plants growth
- magnetisation
- animal transport
- digestion
- respiration
A: respiration