本题目来源于试卷: IB ESS Unit 2: Ecosystems & Ecology，类别为 IB环境系统与社会
[单选题]
Identify the statement that d e*t4 wua;h/-8aoi xixoes nots .ex j(mizb;xj 78+et accurately describe a food web.
A. The trophic level of the primary producers has the highest species abundance.
B. Both aquatic and terrestrial systems have similar chain lengths.
C. Decomposers break down dead organisms from all trophic levels of a food web.
D. Many different herbivores may feed on the same plant species.
参考答案: B
本题详细解析:
Food chain lengths tend to be longer in aquatic systems a umj3-f -k,o*yufc5 kqs compared to terrestrial systems. In general, energy is transferred more efficiently in aquati5kmk -q 3*f-ufu y,jocc systems. Phytoplankton are the producers and the zooplankton that eat them are very efficient.
Species abundance is the number of individuals per species, and they tend to be high at the level of the producers (Option A).
Decomposers are consumers that get their energy from dead remains of animals and waste products called detritus (Option C)
In a food web, many different herbivores may feed on the same plant species, and each herbivore may feed on more than one type of plant species (Option D)
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