(Question)
Answer the following question given this paragraph: 19.4 Community Ecology Communities include all the different species living in a given area. The variety of these species is referred to as biodiversity. Many organisms have developed defenses against predation and herbivory, including mechanical defenses, warning coloration, and mimicry. Two species cannot exist indefinitely in the same habitat competing directly for the same resources. Species may form symbiotic relationships such as commensalism, mutualism, or parasitism. Community. Q: Commensalism, mutualism, and parasitism are known as what type of relationships? Choices: - simple - peculiar - various - symbiotic A:
(Answer)
symbiotic

(Question)
Answer the following question given this paragraph: Water treatment is a series of processes that remove unwanted substances from water. More processes are needed to purify water for drinking than for other uses. Q: What does water treatment do to water? Choices: - increases volume - restores bacteria - adds flavor - removes unwanted substances A:
(Answer)
removes unwanted substances

(Question)
Answer the following question given this paragraph: Cancer of the testes is most common in males aged 15 to 35. It occurs when cells in the testes grow out of control and form a tumor. If found early, cancer of the testes usually can be cured with surgery. Q: What forms when cells start to grow out of control? Choices: - fat - moles - inflammation - tumor A:
(Answer)
tumor