*Question*
If biofuel is used to produce energy, then what is biofuel used to produce? Answer choices: - disease - chemicals - waste - bamboo - engines - sleep - energy - food
**Answer**
energy

*Question*
If if burrs stick to the fur of an animal then burrs will be transported by the animal, then what is transported by sticking to the fur of an animal? Answer choices: - burrs - food - keratin - caviar - A virus - fish - eggs - lipids
**Answer**
burrs

*Question*
If mutations change characteristics of living things over time, then what causes changes in characteristics of living things over time? Answer choices: - mutations - science - parents - environment - light energy - news - alleles - animals
**Answer**
mutations

*Question*
If clams live in freshwater habitats, then where do clams live? Answer choices: - The area was once underwater - remains of prehistoric life - Creeks - Storm drains - members of their own species - the environment - Freshwater habitats - Ponds
**Answer**
Freshwater habitats