Frogs and salamanders compete with each other for insects. Both frogs and salamanders catch flying insects with their tongues. Which feature would most likely help both animals compete for flying insects? OPTIONS:
- sticky tongues
- bright tongues
- thick tongues
- short tongues
A: sticky tongues

The Florida Bog Frog (Lithobates okaloosae) inhabits shallow stream overflows in three counties in Florida. With such a small geographic habitat, any change in the frog's environment could cause drastic changes in the population. Which would most likely affect the frog population if acid rain changed the pH of the water? OPTIONS:
- Prey insects would become inedible.
- Tadpoles would be unable to survive.
- Breeding sites would become unavailable.
- Predators would choose another food source.
A: Tadpoles would be unable to survive.

Some birds build nests in the spring. This nest building is a seasonal adaptation that occurs to help the birds OPTIONS:
- fly south
- find food
- protect their young
- survive the winter
A: protect their young

Several types of mechanisms in the body regulate the rate of chemical reactions in the digestive system. Among the most important are feedback systems, which control the release rate of OPTIONS:
- lipids.
- enzymes.
- nucleic acids.
- carbohydrates.
A:
enzymes.