Which one of the following is considered at the primary level in the food web?ans.NostocHomo sapienceAnabinaGreen plants Previous Marked for Review Next

To determine which of the following options is considered at the primary level in the food web, we first need to understand the concept of a food web and the roles of different organisms within it.

1. Food Web Overview:

   • A food web depicts the feeding relationships among various organisms in an ecosystem. It illustrates how energy and nutrients flow through different trophic levels.
   • The primary level in a food web is typically occupied by producers, which are organisms that can produce their own food through photosynthesis or chemosynthesis.

2. Analysis of Options:

   • Nostoc: A genus of cyanobacteria, it can perform photosynthesis but is generally not classified as a typical primary producer in most ecosystems.
   • Homo sapiens: Humans are consumers and not producers; they do not constitute the primary level.
   • Anabena: Similar to Nostoc, it is a genus of cyanobacteria, primarily functioning as a nitrogen-fixing organism and not the main primary producer.
   • Green Plants: These are classic producers in a food web, as they utilize photosynthesis to convert sunlight into energy, thus forming the base of the food chain.

3. Conclusion:

   • From the given options, Green plants are unequivocally classified as primary producers in the food web.

Final Answer

Green plants are considered at the primary level in the food web.