Pepsin, a common enzyme found in the stomach, is most active at ph values between 0. 5 and 2. 5. It works slowly between ph values of 2. 6 and 3. 4. Beyond a ph of about 3. 5, it becomes completely inactive. Why does this happen?.

What type of animal might be preserved in a tar pit

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.

Which object has the least amount of kinetic energy? a. a car driving down a road b. a soccer ball rolling down a hill c. a bicycle locked to a bike rack d. a satellite orbiting earth