Problem:OPTIONS:
- steroids
- estrogen
- androgen
- testosterone

Q: During adulthood, what is needed for the production of sperm? A:
****
A: testosterone

Problem:OPTIONS:
- charger
- amplifier
- battery
- capacitor

Q: What do we call a device used to store electric charge? A:
****
A: capacitor

Problem:OPTIONS:
- dinoflagellates
- common plankton
- zooplankton
- phytoplankton

Q: Which type of plankton make food via photosynthesis? A:
****
A: phytoplankton

Problem:OPTIONS:
- impassable
- theonym membranes
- variably membranes
- semipermeable membranes

Q: Osmotic pressure is important in biological systems because cell walls are what? A:
****
A:
semipermeable membranes