Question 1. Suggest a food chain in which one of the trophic levels is occupied by human beings. Question 2. Draw the conclusion for if all the herbivores are removed from the grassland. Question 3. From the following list find out the organism which is likely to have maximum concentration of
pesticide in its body: grass, grasshopper, frog, snake, and hawk. Question 4. Propose a way to dispose of vegetable peels, so that the environment is not polluted. Question 5.
In an ecosystem, rats feed on grains. Name the trophic level to which the rats belong. Question 6. Name two chemicals that are responsible for thinning of the ozone layer. Question 7. What is the function of the zone in the upper atmosphere?
Question 8. List two human-made (artificial) ecosystems. Question 9. Name two gases that have replaced CFCs.
Answers
Answer:
1-A food chain in which one of the trophic levels is occupied by human being = Grass-Goat-Human.
2-Draw the conclusion for if all the herbivores are removed from the grassland. (i) Consumers would decrease. (ii) Grass would spread all over causing hinderance to other organisms thus disturbing ecosystem.
3-Grass Grasshopper Frog Snake Eagle The organism which occurs at the highest trophic level in the food chain will have the maximum concentration of harrnful chemicals in its body. since, eagle occurs atthe highest trophic level, therefore, it will have the maximum concentration of harrnful chemicals in its body.
4-Mention 4 ways to dispose off vegetable peels so that the environment isn't polluted.
By making compost pit.
some vegetable scrapes such as cauliflower and other green vegies could be eaten by Cattles.
We can prepare manure for garden by vermi-composting.
By preparing green manure.
5-The rats which feed on the grain are primary consumers, (as they feed off producers) and form the second trophic level. If a cat were to eat the rats, the cat would be a carnivorous predator and a secondary consumer, thus forming the third trophic level. Hope this helps
6-chlorofluorocarbons (CFCs) halon. carbon tetrachloride (CCl4) methyl chloroform (CH3CCl3)
7-The function of the ozone layer in the upper atmosphere is to absorb most of the harmful ultraviolet rays coming from the sun and prevent them from reaching the earth's surface
8-An ecosystem, which is created and maintained by human beings, is called artificial or man- made ecosystem. Some examples of man- made ecosystem are aquarium, garden, agriculture, apiary, poultry, piggery etc.
9-Chloro Floro Carbons are one of the most dangerous gases present in the atmosphere. They are the main reason for the depletion of ozone layer but now a days there are two other gases that are replacing the Chloro floro carbons. They are carbon dioxide and methane.
Explanation:
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Answer:
1. A food chain in which one of the trophic levels is occupied by human being = Grass-Goat-Human.Humans, for example, are primary consumers when they eat plants such as vegetables . Many humans are omnivores, meaning they consume both plant and animal material. Thus, they may be on the third or even fourth tropic level. For example, if you consume beef you are a part of the third tropic level.
2. Draw the conclusion for if all the herbivores are removed from the grassland. (i) Consumers would decrease. (ii) Grass would spread all over causing hinderance to other organisms thus disturbing ecosystem.
3. Grass Grasshopper Frog Snake Eagle The organism which occurs at the highest trophic level in the food chain will have the maximum concentration of harrnful chemicals in its body. since, eagle occurs atthe highest trophic level, therefore, it will have the maximum concentration of harrnful chemicals in its body
4. Vegetable peels are bio-degradeable in nature. So puting them in the soil can dispose them as the microbe will start acting on the vegetable peels.
5. The rats which feed on the grain are primary consumers, (as they feed off producers) and form the second trophic level. If a cat were to eat the rats, the cat would be a carnivorous predator and a secondary consumer, thus forming the third trophic level.
6.When chlorine and bromine atoms come into contact with ozone in the stratosphere, they destroy ozone molecules
7. The Ozone layer at the upper atmosphere perform the function of absorbing the harmful ultra violet (UV) rays coming from sun and prevents them from reaching the earth. These UV rays cause harmful effects to humans, animals and plants
8. An ecosystem, which is created and maintained by human beings, is called artificial or man- made ecosystem. Some examples of man- made ecosystem are aquarium, garden, agriculture, apiary, poultry, piggery etc.Garden and pond are man-made ecosystems.
9. Name two gases which have replaced cfcs. Hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs) donot cause harm to ozone layer and are the alternatives to CFCs.