Ques: If male dogs use natural aphrodisiacs in urine to mark their territory, then what do male dogs use in urine to mark their territory? Answer choices: - Natural aphrodisiacs - competing for resources - Tails - Urine cleaner - Something coming from a gland - Chemical energy - an area swollen with pus - Chew toys
Ans: Natural aphrodisiacs

Ques: If carpooling decreases emissions, then what can help decrease emissions? Answer choices: - power - exercise - Carpooling - Flying on airplanes - Having children - Eating red meat - green manures - electricity
Ans: Carpooling

Ques: If bacteria can cause disease, then of the following, which is most likely to cause disease? Answer choices: - one celled organisms - influenza - Allergies - smallpox - antibiotic - bones - Anthrax bacteria - lungs
Ans: Anthrax bacteria

Ques: If the environmental changes affect the life history of a species, then what can environmental change affect? Answer choices: - DNA damage and mutations - the life history of a species - Animal survival - organisms and their habitat - rivers and streams - global ecosystems - that material's properties - other living things
Ans:
the life history of a species