Q: An example of an instinct is

OPTIONS:
- laughing at something funny.
- dogs doing tricks when told.
- doing your homework at the same time each day.
- salmon returning to their birthplace to lay their eggs.
A: salmon returning to their birthplace to lay their eggs.
Q: What is the role of decomposers in a food chain?

OPTIONS:
- They consume other organisms.
- They break down dead organic matter.
- They use the Sun's energy to make food.
- They convert inorganic matter into organic matter.
A: They break down dead organic matter.
Q: Which is the best example of evaporation?

OPTIONS:
- raindrops freezing
- an ice cube melting
- a puddle drying in the sun
- a sponge soaking up water
A: a puddle drying in the sun
Q: Which of these characteristics best helps scientists classify organisms?

OPTIONS:
- size
- color
- gender
- structure
A:
structure