Question

Food web contains many.
A. Primary consumers
B. Secondary consumers
C. Tertiary consumers
D. Food chains

Answer 1

Hint: The different biological activities that take place in organisms such as reproduction, growth, cell division, and metabolism are all processes that require energy. A food web is generally exclaimed as an interconnecting sequence that represents in detail the overall food relationships between organisms in a particular environment.

Complete Answer:
A food web or food chain, both consists of producers, consumers, and decomposers. The food web or food pyramid is a network and interconnection of food chains. In this network, the organisms are interconnected with each other at various trophic levels for the purpose of forming several feeding connections amongst members of a biotic community. A food web defines the complex feeding relationships for a particular ecosystem.

Now let us gather some information about given options:
- Primary consumers: These animals directly are dependent on producers by obtaining food from them. They are also called herbivores or the main industry animals. (Convert plant matter and products into animal matter) Aquatic ecosystem : Common herbivores are molluscs, tadpole and mosquito larvae.
- Secondary Consumers: They are animals which feed on herbivores. Aquatic ecosystem: Hydra, frog, and zooplanktons constitute mainly the secondary consumers.
- Tertiary Consumers: Carnivores which feed and eat upon secondary consumers e.g., large fishes (aquatic ecosystem), snake (terrestrial ecosystem). There may be quaternary or fourth order consumers which feed and act as predators upon secondary carnivores.
- Food chains: As three of the above are present in a food chain and food web is interconnection of food chains so this option is exactly correct. The food chain is defined as a representation of a linear sequence of organisms.

Hence the correct answer is option D.

Note: The food web is defined as a network of food chains in an ecosystem where all organisms are interconnected and dependent on each other. Each organism is eaten by the other organism and then those organisms are eaten by several other organisms, these series of organisms where one is dependent for food on another is called the food web. The flow of energy in a food web is always unidirectional. In a food web, the supplies of food never end. Therefore, it is more stable than the food chain.