(Question)
If time and energy are one way animals learn to behave, then what is one way animals learn to behave? Answer choices: - garbage - Generating heat - Space travel - running and lifting - Time and energy - exercise - money - Riding a bike
(Answer)
Time and energy

(Question)
If the building blocks of lipids may contain other molecules as well, then what of lipids may contain other molecules as well? Answer choices: - empty spaces - big spaces - building blocks - small parts - solid, liquid, gas - Organic compounds - layers of fat - bioaerosols
(Answer)
building blocks

(Question)
If pollution is usually harmful to population size of a species, then what is usually harmful to the population size of a species? Answer choices: - Pollution - reproduction - viruses - disease - habitat - ecosystems - influenza - deforestation
(Answer)
Pollution