Consider the following kinds of organisms: 1. Copepods 2. Cyanobacteria 3. Diatoms 4. Foraminifera Which of the above are primary producers in the food chains of oceans?

Which of the following represent the food chain in a forest?

Which of the following organisms convert inorganic substances into organic compounds using sunlight in the presence of chlorophyll?

Which of the following limits the number of trophic levels in a food chain ?

Which of the following are constituents of an ecosystem?

A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is: Food crop - Rat - Snake - Hawk. In this food chain, the highest concentration of the pesticide would accum…