Cancer is best described as OPTIONS:
- a type of genetic engineering
- the merging of sex cells
- abnormal cell division
- tissue that stops growing
A: abnormal cell division

Which of the following activities is the best example of instinctive behavior in an animal? OPTIONS:
- A dog sits when told to sit by its owner.
- A bird avoids an insect that has a bad taste.
- A newly hatched sea turtle walks toward the ocean.
- A chimpanzee uses a stick to pull termites from a tree stump.
A: A newly hatched sea turtle walks toward the ocean.

During an experiment, a student reports that a liquid turned green when mixed with another liquid. This is an example of OPTIONS:
- a measurement
- a prediction
- an explanation
- an observation
A: an observation

When plants undergo photosynthesis, a reaction produces sugar, oxygen, and water. During respiration, stored energy from the products of photosynthesis is converted to usable energy. In what form is the energy stored prior to use in respiration? OPTIONS:
- chemical energy
- kinetic energy
- light energy
- heat energy
A:
chemical energy