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1. The following description of the concept of population is correct () A. The general term for individuals of the same species in different regions B. The general term for individuals of the same species in the same area The general term for various fishes in a lake Analysis of the general term of animals and plants with mutual relationship in an ecological environment: choose B. Population refers to the sum of individuals of the same species in a certain space and time. In other words, a population is all individuals of a species in a certain area in a certain period of time. To analyze this concept, it should include three main points: â‘ have a certain space and time range; â‘¡ a species; â‘¢ all individuals. If it is missing or does not meet any of them, the narrative of the concept is incomplete or inaccurate. 2. The following statement about the population density survey is reasonable (multiple choice) () A. It is advisable to choose vines or clumps of monocotyledonous plants as the object of sampling survey. It is advisable to use this method to investigate the population density of higher animals with strong mobility C. The key to sampling is to do random sampling