1. What is fermentation? 2. How does a vaccine work?

3. What is metamorphosis?

4. How does Hydra reproduce?

5. What do you understand by puberty?

6. How does fertilization occur in frogs?

7. What are the differences between plant and animal cells?

8. Why is the pituitary gland referred to as the master gland?

9. Differentiate between unicellular and multicellular organisms.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.