| 2023-07-15 | On the basis of following features identify correct option.
A. It is a graphic representation of... | 3:06 | 0 | |
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| 2023-07-15 | Carefully observe the diagram(s) given below
Cause of following effects is
a. Global warming
b. ... | 3:22 | 1 | |
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| 2023-07-15 | In a highly pesticide polluted pond, which of the following aquatic organisms will have the maxi... | 2:43 | 2 | |
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| 2023-07-15 | Read the following statements carefully
A. Energy transfer in the biotic world always proceeds f... | 3:21 | 0 | |
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| 2023-07-15 | Prolonged exposure to the fumes released by incomplete combustion of coal may cause death of a h... | 2:50 | 3 | |
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| 2023-07-15 | What is the main reason for increase in temperature in a glass house?
a. Sunlight is completely ... | 2:31 | 0 | |
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| 2023-07-15 | Which of the following is an result of biological magnification?
a. Top level predators may be h... | 3:32 | 0 | Vlog |
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| 2023-07-15 | In the following food chain who gets more energy than the tertiary consumer and less than the pr... | 3:27 | 0 | |
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| 2023-07-15 | If a non-degradable and fat soluble pollutant, such as DDT enters the food chain, the pollutant
... | 3:21 | 0 | |
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| 2023-07-15 | Abundance of coliform bacteria in a water body is indicative of pollution from
a. Petroleum refi... | 2:22 | 2 | |
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| 2023-07-15 | Some organisms are sensitive to different levels of air pollution and are used as pollution - in... | 2:06 | 1 | |
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| 2023-07-15 | An analysis of soil sample revealed \( 0.1 \mathrm{mg} \) of a pesticide and \( 1 \mathrm{mg} \)... | 2:27 | 0 | |
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| 2023-07-15 | Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each high... | 3:30 | 0 | |
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| 2023-07-15 | A large ecosystem with its associated plants and animals is called
a. Habitat
b. Biome
c. Biomas... | 2:15 | 0 | |
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| 2023-07-15 | Energy flow is the key function of an ecosystem. It is unidirectional. The energy that is captur... | 3:54 | 0 | |
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| 2023-07-15 | Energy flow is the key function of an ecosystem. It is unidirectional. The energy that is captur... | 3:19 | 0 | |
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| 2023-07-15 | are also called saprophytes. a. Producers b. Consumers c. Decomposers d. Parasites | 1:52 | 1 | |
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| 2023-07-15 | Energy flow is the key function of an ecosystem. It is unidirectional. The energy that is captur... | 2:43 | 0 | |
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| 2023-07-15 | Food web is a network of food chains which become interconnected at various trophic level. The l... | 6:55 | 0 | |
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| 2023-07-15 | Energy flow is the key function of an ecosystem. It is unidirectional. The energy that is captur... | 3:18 | 1 | |
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| 2023-07-15 | Food web is a network of food chains which become interconnected at various trophic level. The l... | 2:34 | 0 | |
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| 2023-07-15 | Food web is a network of food chains which become interconnected at various trophic level. The l... | 2:43 | 0 | |
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| 2023-07-15 | Food web is a network of food chains which become interconnected at various trophic level. The l... | 3:03 | 0 | |
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| 2023-07-15 | Ozone layer is present in the earths atmosphere and shields the surface of the earth from ultrav... | 2:36 | 0 | |
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| 2023-07-15 | Ozone layer is present in the earths atmosphere and shields the surface of the earth from ultrav... | 4:01 | 1 | |
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| 2023-07-15 | Food web is a network of food chains which become interconnected at various trophic level. The l... | 2:14 | 2 | |
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| 2023-07-15 | Ozone layer is present in the earths atmosphere and shields the surface of the earth from ultrav... | 3:40 | 0 | |
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| 2023-07-15 | Ozone layer is present in the earths atmosphere and shields the surface of the earth from ultrav... | 2:43 | 2 | |
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| 2023-07-15 | Ozone layer is present in the earths atmosphere and shields the surface of the earth from ultrav... | 3:40 | 1 | |
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| 2023-07-15 | All living organisms in any given ecosystem are linked in a systematic chain with respect to the... | 3:32 | 0 | |
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| 2023-07-15 | Ozone layer is present in the earths atmosphere and shields the surface of the earth from ultrav... | 2:44 | 0 | |
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| 2023-07-15 | All living organisms in any given ecosystem are linked in a systematic chain with respect to the... | 3:24 | 0 | |
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| 2023-07-15 | All living organisms in any given ecosystem are linked in a systematic chain with respect to the... | 2:40 | 3 | |
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| 2023-07-15 | All living organisms in any given ecosystem are linked in a systematic chain with respect to the... | 4:27 | 0 | |
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| 2023-07-15 | Direction: In the following Questions, the Assertion and Reason have been put forward. Read the ... | 3:24 | 2 | |
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| 2023-07-15 | All living organisms in any given ecosystem are linked in a systematic chain with respect to the... | 2:48 | 0 | |
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| 2023-07-15 | Direction: In the following Questions, the Assertion and Reason have been put forward. Read the ... | 3:11 | 3 | |
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| 2023-07-15 | Direction: In the following Questions, the Assertion and Reason have been put forward. Read the ... | 2:40 | 3 | |
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| 2023-07-15 | Pyramid of biomass is
a. A graphic representation of total amount of organic matter in an ecosys... | 2:57 | 2 | |
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| 2023-07-15 | Direction: In the following Questions, the Assertion and Reason have been put forward. Read the ... | 2:34 | 0 | |
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| 2023-07-15 | Consider the following statements:
A. Waste are of two types, biodegradable and nonbiodegradable... | 3:16 | 2 | |
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| 2023-07-15 | Direction: In the following Questions, the Assertion and Reason have been put forward. Read the ... | 2:47 | 1 | |
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| 2023-07-15 | Which of the following has an inverted pyramid
a. Pyramid of number in a grassland
b. Pyramid of... | 4:04 | 1 | |
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| 2023-07-15 | On the basis of following features identify correct option.
A. They decompose into soil.
B. They... | 2:08 | 1 | |
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| 2023-07-15 | Disposal of garbage can be made eco-friendly
a. Segregating the waste into biodegradable and non... | 3:06 | 1 | |
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| 2023-07-15 | Consider the following statements:
A. Food is responsible for the survival of all types of troph... | 3:11 | 0 | |
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| 2023-07-15 | In an ecosystem, there were grass, plants, rats, dogs, deer, horses and lions. Will it sustain?
... | 3:39 | 0 | |
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| 2023-07-15 | Which group of organisms are not a part of a food chain?
A. Grass, lion, rabbit, wolf
B. Plankto... | 2:42 | 2 | |
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| 2023-07-15 | Consider the following statements:
A. Earth is kept warm due to green house effect.
B. Reproduct... | 2:32 | 0 | |
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| 2023-07-15 | key concept- food chain \[ -\rho \] | 2:01 | 4 | |
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| 2023-07-15 | Which of the following steps is not related to formation of ozone?
a. Ozone is a toxic gas.
b. U... | 2:32 | 2 | |
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| 2023-07-15 | Conservation of the ozone layer
a. Is important because it helps in preventing harmful UV radiat... | 2:12 | 0 | Let's Play |
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| 2023-07-15 | Our food contains varying amounts of pesticide residues. This is so because of
a. Biological mag... | 2:36 | 0 | Vlog |
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| 2023-07-15 | In the following groups of materials, given below which groups (s) contains only non-biodegradab... | 2:53 | 0 | |
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| 2023-07-15 | Increased exposure of UV rays to humans results in
A. Damage to immune system
B. damage to lungs... | 1:58 | 0 | |
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| 2023-07-15 | In the given food chain, if the amount of energy at fourth trophic level is \( 3 \mathrm{~kJ} \)... | 2:37 | 3 | |
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| 2023-07-15 | Which of the statement is incorrect?
a. All green plants as well as blue green algae are produce... | 2:29 | 0 | |
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| 2023-07-15 | Disposable plastic plates should not be reused because
a. They are made of materials with light ... | 2:28 | 0 | |
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| 2023-07-15 | In the given figure, different trophic levels are represented in a pyramid. At which trophic lev... | 2:16 | 0 | |
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| 2023-07-15 | In the given figure the various trophic levels are represented in a pyramid. At which trophic le... | 1:38 | 1 | |
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| 2023-07-15 | On the basis of following features identify correct option from the following.
A. The concentra... | 2:55 | 0 | |
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| 2023-07-15 | The saprotrophs in an ecosystem
a. Convert inorganic material to simpler forms
b. Convert organi... | 1:45 | 1 | |
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| 2023-07-15 | Which type of wastes are given below. Choose the correct option from the following.
A. Leaves
B.... | 1:38 | 1 | |
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| 2023-07-15 | All green plants and certain blue green algae make their food by making organic compounds like s... | 2:15 | 0 | |
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| 2023-07-15 | The sequence of species through which the organic molecules in a community pass is
a. Pyramid of... | 2:00 | 0 | |
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| 2023-07-15 | In an ecosystem, which of the following occurs as abiotic compounds
a. Microorganisms
b. Cycling... | 1:59 | 0 | |
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| 2023-07-15 | How many trophic levels are usually present in a food chain? a. One b. Four c. Infinite d. Five | 2:34 | 0 | |
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| 2023-07-15 | The percentage of solar radiation absorbed by all the green plants for the process of photosynth... | 1:38 | 0 | |
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| 2023-07-15 | On the basis of following features identify correct option.
A. It is a graphic representation of... | 3:06 | 0 | |
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| 2023-07-15 | The food chain, in which micro organisms breakdown the energy rich compounds is called
a. Aquati... | 2:09 | 0 | |
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| 2023-07-15 | Food web is
a. A network of food chains operating in an ecosystem which has no relation with oth... | 2:04 | 0 | |
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| 2023-07-15 | Bioremediation is a process in which
a. A technique for cleaning the environment with biological... | 2:52 | 0 | Vlog |
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| 2023-07-15 | Suggest the correct sequence of various autotrophic levels likely in the food chain that involve... | 2:19 | 2 | |
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| 2023-07-15 | Food webs are prominent in an ecosystem because
a. A consumer is not dependent on a single type ... | 2:48 | 0 | |
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| 2023-07-15 | \( \rightarrow \) Zooplanktons \( \rightarrow \) Fish larva \( \rightarrow \) Small fish \( \rig... | 1:30 | 4 | |
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| 2023-07-15 | The energy transferred from one trophic level to the higher trophic level
a. Can be transferred ... | 3:01 | 1 | |
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| 2023-07-15 | Excessive use of disposable packaging materials is affecting the environment because
a. They are... | 1:53 | 1 | |
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| 2023-07-15 | How much energy is transferred from one level of consumers to the next?
a. All of these
b. Only ... | 2:45 | 0 | |
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| 2023-07-15 | All consumers whether herbivores, carnivores or parasites depend on directly or indirectly for t... | 3:22 | 0 | |
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| 2023-07-15 | Which is abiotic or non-living component of ecosystem? a. Humus b. Bacteria c. Plants d. Fungi | 1:44 | 0 | |
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| 2023-07-15 | In a terrestrial ecosystem, green plants absorbs about \( 1 \% \) of the energy of sunlight that... | 2:20 | 0 | |
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| 2023-07-15 | Growth, reproduction and other functions of living organisms are affected by
a. Abiotic componen... | 2:20 | 0 | |
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| 2023-07-15 | Interactions among various components of the environment involves from one level of the system t... | 2:26 | 0 | |
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| 2023-07-15 | After the examination, Rakesh with his friends went on a picnic to nearby park. All friends carr... | 2:43 | 0 | |
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| 2023-07-15 | The microorganisms that break-down the complex organic substances of dead remains and waste prod... | 2:10 | 0 | |
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| 2023-07-15 | Biodegradable substances are those substances that
a. Can be broken down by the action of bacter... | 2:03 | 0 | |
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| 2023-07-15 | All the interacting organisms in area together with the abiotic constituents of the environment ... | 2:17 | 0 | |
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| 2023-07-15 | Which of the following is non-biodegradable substance?
a. Polythene
b. Cotton cloth
c. Leaves
d.... | 1:50 | 0 | |
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| 2023-07-15 | Level represented by carnivores is
a. Producers
b. Secondary and tertiary consumers
c. Phytoplan... | 2:35 | 0 | |
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| 2023-07-15 | In every food chain green plants are a. Saprophytes b. Producers c. Consumers d. None of the above | 2:07 | 0 | |
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| 2023-07-15 | Explain the phenomenon of biological magnification How does it affect organisms belonging to dif... | 3:06 | 0 | Vlog |
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| 2023-07-15 | After the examination, Rakesh with his friends went on a picnic to nearby park. All friends carr... | 3:18 | 2 | |
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| 2023-07-15 | Name the wastes which are generated in your house daily. What measures would you take their disp... | 4:19 | 1 | |
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| 2023-07-15 | Consider the following food chain which occurs in a forest: Grass \( \rightarrow \) Deer \( \rig... | 3:40 | 0 | |
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| 2023-07-15 | (a) What are trophic levels in a food chain? (b) Explain the flow of energy through food chain. | 3:09 | 1 | |
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| 2023-07-15 | Show steps of food chains operating in: (a) Forests (b) Grasslands (c) Ponds | 2:43 | 0 | Show |
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| 2023-07-15 | List three problems which arise due to construction of big dams. Suggest a solution for these pr... | 2:42 | 0 | |
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| 2023-07-15 | Difference between food chain and food web. | 4:31 | 0 | |
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| 2023-07-15 | Define and give examples of each of these heterotrophic types: herbivores, carnivores, omnivores... | 3:54 | 0 | |
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| 2023-07-15 | Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to con... | 2:46 | 1 | |
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