Problem:OPTIONS:
- leaves
- toxins
- fibers
- spores

Q: Within the petals are two whorls of fertile floral organs that produce what? A:
****
A: spores

Problem:OPTIONS:
- physiology
- biology
- geology
- chemistry

Q: What is the study of matter and the changes that material substances undergo. A:
****
A: chemistry

Problem:OPTIONS:
- public motor
- melodic motor
- Magnetic motor.
- electric motor

Q: What device uses an electromagnet to change electrical energy to kinetic energy? A:
****
A: electric motor

Problem:OPTIONS:
- estrogen
- nicotine
- methane
- testosterone

Q: During adolescence, what causes most of the changes associated with puberty? A:
****
A:
testosterone