Which of the following statements about food chains or food webs is true______
A. In an ecosystem, the more complex the species, the larger the number of individuals, and the more food chains
B. Along the food chain, animals get bigger and bigger
C. In the food web, each animal can only be assigned to a specific trophic level according to the animal's diet
D. The greater the amount of a certain organism introduced into the ecosystem, the higher the resistance stability of the ecosystem
Answer:A
Which of the following statements about food chains or food webs is true______
A. In an ecosystem, the more complex the species, the larger the number of individuals, and the more food chains B. Along the food chain, animals get bigger and bigger C. In the food web, each animal can only be assigned to a specific trophic level according to the animal's diet D. The greater the amount of a certain organism introduced into the ecosystem, the higher the resistance stability of the ecosystem