Q: Excretory organs that conserve what essential substance help terrestrial animals to avoid desiccation?    Choices:  - metabolytes  - air  - food  - water  A:
water

Q: Myopia and hyperopia are defects that can be corrected with devices?    Choices:  - crutches  - casts  - fins  - lenses  A:
lenses

Q: Like birds, most other reptiles excrete their nitrogenous wastes as what acid?    Choices:  - hydrochloric  - sulphuric  - lactic  - uric  A:
uric

Q: The pressure of a sample of gas is measured with an open-end what?    Choices:  - thermometer  - barometer  - altimeter  - manometer  A:

manometer