Problem:OPTIONS:
- rapid expansion
- sickness
- a continual progress
- resistance
- growth
- allow growth
- Plant reproduction
- chromosomes

You are presented with the quiz "What is mutation essential for?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mutations are essential for evolution to occur" and "evolution can be defined as continual progress". So, what's the best answer to the question?
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A: a continual progress

Problem:OPTIONS:
- global warming
- colder weather
- Greenhouse gases
- clear weather
- Dehydration
- erosion
- flooding
- contamination

You are presented with the quiz "Anticyclones cause what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "high pressure systems cause clear weather" and "also known as an cyclone , it is the opposite of an area of high pressure , or a anticyclone". So, what's the best answer to the question?
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A: clear weather

Problem:OPTIONS:
- The number of individuals
- sub-units of species
- the Arctic
- different organisms' numbers
- ice
- biological diversity
- penguins
- heat and light

You are presented with the quiz "What increases in habitats from the poles to the equator?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "biodiversity generally increases from the poles to the equator" and "biodiversity is equated with the number of different organisms present in a habitat ". So, what's the best answer to the question?
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A: different organisms' numbers

Problem:OPTIONS:
- Plant growth is reduced
- Decreases population
- protect them
- cause their death
- Creates demand for the species
- Strengthens the species
- massive damage
- Increases population

You are presented with the quiz "What does hunting do to a species?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "harming an animal species has a negative impact on the population size of that species" and "sometimes hunting can impact animal populations". So, what's the best answer to the question?
****
A:
Decreases population