Question

1- why is pond self - sustaining unit while an acuarium may not be? Justify the answer . 2- Arrange grasshopper, frog, grass, eagle, and snake in the form of food chain. 3- If 1000KJ energy is available at producer lever , how much energy will be available at first carnival level? 4- why do most food chains have 3-5 steps why? 5- Select the biodegradable items from the list given blow- Poythene bages, old clothes, wilted flowers, pencil shavings, glass bangles, bronze statue. vagetable peels. 6- what will be impact on ecosystem if bacteria and fungi are removed from the Environment? 17-Exoress your feeling on the picture given down below. What will happen if all? Carnivores are eleiminated from the environment ? What measures will you take to save? Tiger?

Answer 1

1 ans- because in a pond there are lots of parasites and other decomposers while in a aquarium these are not present.