Q: You are presented with the quiz "When does macroevolution over eras occur?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "macroevolution is evolution over geologic time above the level of the species" and "geologists break time down into geologic time units called eras ". So, what's the best answer to the question?

OPTIONS:
- relocation
- colder and wetter
- in a few years
- permineralization
- over eras of time
- within a lifetime
- Continents drifting
- in minutes

A: over eras of time

Q: You are presented with the quiz "Trees have woody stems covered with what?" 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 "during the stripping, the protective layer of inner bark is removed". So, what's the best answer to the question?

OPTIONS:
- food and shelter
- smooth ridges
- looseness
- protective layer
- Organic compounds
- plastic sheet
- heat energy
- thin metal

A: protective layer

Q: You are presented with the quiz "Coral reefs provide what to many living beings in the ocean" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "coral reefs provide food and shelter to many ocean organisms" and "organisms or living beings are literally things that are alive". So, what's the best answer to the question?

OPTIONS:
- Chemical energy
- salt and water.
- shelter and amusement
- survival
- important habitats
- food and water
- water and fun
- food and shelter

A: food and shelter

Q: You are presented with the quiz "What occurs in response to a change in the environment?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "evolution occurs in response to a change in the environment" and "natural selection is the main mechanism of evolution". So, what's the best answer to the question?

OPTIONS:
- relocation
- sunlight
- moonlight
- artificial selection
- ground to shake
- Animal survival
- natural selection
- It helps them survive

A:
natural selection