4. Susan can drink one glass of milk without having any symptoms, but if she
drinks two glasses, she gets painful cramps. Do you think her body produces
lactase? Explain.

The pattern of this wave changes between its beginning and end. what is true about the amplitude and wavelength of the wave when the pattern changes?

Introducing minvasive species to an ecosystem results in an increase in biodiversity is it true or false

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?