What does not normally lay eggs?
Options:
- (A) swea
- (B) insects
- (C) Mammal
- (D) chickens
- (E) cows
- (F) animals
- (G) parasites
- (H) ducks
--
Let's think first: Platypus females lay their eggs in a burrow. Although the platypus is a mammal, it is bizarre and lays eggs . Mammals do not usually lay eggs.... So the answer is [(C)]

Which type of pollution is most harmful to lungs?
Options:
- (A) Lead
- (B) air
- (C) Cars
- (D) oil
- (E) acid
- (F) CFCs
- (G) SO2
- (H) mold
--
Let's think first: Air pollution harms the respiratory and circulatory systems. Exposure to ozone can diminish lung function and increase susceptibility to respiratory infection. Exposure to air pollution can harm the lungs.... So the answer is [(B)]

What contains the green pigment chlorophyll?
Options:
- (A) seeds
- (B) orchids
- (C) barnacles
- (D) cacti
- (E) plastids
- (F) ferns
- (G) Most plants
- (H) bioaerosols
--
Let's think first: Chloroplasts contain the green pigment chlorophyll. Chloroplasts are the most familiar plastids. Plastids contain the green pigment chlorophyll.... So the answer is [(E)]

Most people can survive only a few days without what?
Options:
- (A) carbon dioxide
- (B) oxygen
- (C) h2o
- (D) H20
- (E) NaCl
- (F) CO2
- (G) soda
- (H) urea
--
Let's think first: Most people can survive only a few days without water. Water is everywhere H20. Most people can survive only a few days without H20.... So the answer is [(D)]

How can an animal learn actions?
Options:
- (A) movement
- (B) Chemical energy
- (C) by fighting
- (D) through play
- (E) by eating
- (F) when they sleep
- (G) stamina
- (H) Riding a bike
--
Let's think first: Behaviors can be learned through play. Kids imitate adult actions and behaviors. Actions can be learned through play.... So the answer is [(D)]

Which of the following would animals use to store energy?
Options:
- (A) fats
- (B) plants
- (C) sodium
- (D) blood
- (E) Energy
- (F) sugar
- (G) food
- (H) carcass
--
Let's think first: Animals use saturated fatty acids to store energy. Fatty Acids Fatty acids are the building blocks of fats. Animals use fats to store energy.... So the answer is [(A)]