6. Which of the following best describes the theory of punctuated equilibrium?
a. Biological change occurs quickly over a short period of time.
b. Tiny changes in a species add up to major changes over time.
C. A biological change occurs slowly and steadily over a long period of time.
d. Events throughout the history of life have caused the extinction of species.

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

What do nitrifying bacteria convert

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?