Paleontologists and ecologists agree that select one:

a. extinction is tied exclusively to human activities

b. 99% of all species that have ever existed are now extinct

c. biodiversity is evenly spread over the earth's biomes

d. vmore than 99% of all species alive today have been discovered and described

e. more than 99% of all species alive today have been discovered and described

If you are in a chronic state of anxiety but also suffer from moment of sudden, intense fear you are problably suffering. from

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs

2. cheryl hears a new song on the radio every day during the week on her commute to work. surprisingly, when the song comes on at a party on saturday night, she knows most of the words without trying. describe the three ways that we use cognition to learn without reinforcement. which type of cognitive learning without reinforcement best explains how cheryl knew the song lyrics? explain your answer.