MCQ 1511 Mark
In which of the following does the pyramid of numbers appear as inverted pyramid?
- ✓Grassland ecosystem
- BPond ecosystem
- CTree ecosystem
- DForest ecosystem
Answer
View full question & answer→Correct option: A.
Grassland ecosystem
Questions · Page 4 of 4
M.C.Q
MCQ 1521 Mark
Bad ozone is formed in.
- AAtmosphere.
- BIonosphere.
- CStratosphere.
- ✓Troposphere.
Answer
View full question & answer→Correct option: D.
Troposphere.
In the Earth's lower atmosphere, near ground level, ozone is formed when pollutants emitted by cars, power plants, industrial boilers, refineries, chemical plants, and other sources react chemically in the presence of sunlight. Ozone at ground level is a harmful air pollutant.
MCQ 1531 Mark
In the following groups of materials, which group $(s)$ contains only non-biodegradable items?
- Wood, paper, leather.
- Polythene, detergent $,\text{PVC}.$
- Plastic, detergent, grass.
- Plastic, bakelite $,\text{DDT}.$
- A$(iii).$
- B$(iv).$
- C$(i)$ and $(iii).$
- ✓$(ii)$ and $(iv).$
Answer
View full question & answer→Correct option: D.
$(ii)$ and $(iv).$
The substances which can’t be decayed by the action of microbes are non-biodegradable substances e.g. polythene, Bakelite $,\text{PVC},$ detergent $,\text{DDT},$ plastic etc.
Substances which can be decayed by microbes are called biodegradable substances i.e. Wood, paper, grass etc.
Substances which can be decayed by microbes are called biodegradable substances i.e. Wood, paper, grass etc.
MCQ 1541 Mark
What will happen if deer is missing in the food chain given below? Grass $\rightarrow $ Deer $\rightarrow $ Tiger
- AThe population of tiger increases.
- BThe population of grass decreases.
- CTiger will start eating grass.
- ✓The population of tiger decreases and the population of grass increases.
Answer
View full question & answer→Correct option: D.
The population of tiger decreases and the population of grass increases.
If deer is missing in the food chain then there will be no herbivore to consume grass, so population of grass will increase.
Tiger will start to die of hunger, so the population of tiger will decrease.
Tiger will start to die of hunger, so the population of tiger will decrease.
MCQ 1551 Mark
Accumulation of non $-$ biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as :
- AEutrophication.
- BPollution.
- ✓Biomagnification.
- DAccumulation.
Answer
View full question & answer→Correct option: C.
Biomagnification.
The accumulation of non $-$ biodegradable pesticides in the food chain in an increasing amount at each higher trophic level is known as biomagnifications.
MCQ 1561 Mark
Accumulation of non $-$ biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as :
- AEutrophication.
- BPollution.
- ✓Bio $-$ magnification.
- DAccumulation.
Answer
View full question & answer→Correct option: C.
Bio $-$ magnification.
Accumulation of non $-$ biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as bio $-$ magnification.
MCQ 1571 Mark
Find the odd one out :
- ASpider
- BLizard
- CCrow
- ✓Honeybee
Answer
View full question & answer→Correct option: D.
Honeybee
In a food chain, spider, lizard, crow belongs to higher tropic levels. These are generally carnivores.
However, honeybees feed on pollen and nectar. Hence they are primary consumers and occupy a different level in the food chain.
However, honeybees feed on pollen and nectar. Hence they are primary consumers and occupy a different level in the food chain.
MCQ 1581 Mark
If the primary producers are absent from any ecosystem, which of the following will occur?
- AHerbivores will not be able to survive.
- BCarnivores will not be able to survive.
- ✓Both herbivores and carnivores will not be able to survive because of the absence of food.
- DNo change will take place.
Answer
View full question & answer→Correct option: C.
Both herbivores and carnivores will not be able to survive because of the absence of food.
All consumers are directly or indirectly dependent on producers for food.
For example, herbivores eat plants. If plants are removed, then herbivores will not survive as their source of food will be absent. If herbivores will not survive then carnivores $($that eat herbivores$)$ will also not survive.
For example, herbivores eat plants. If plants are removed, then herbivores will not survive as their source of food will be absent. If herbivores will not survive then carnivores $($that eat herbivores$)$ will also not survive.
MCQ 1591 Mark
An ecosystem is a complex interacting system of :
- AIndividual and community
- BPopulation and nearby industry
- ✓Community and their physical environment
- DCommunity and their soil condition
Answer
View full question & answer→Correct option: C.
Community and their physical environment
An ecosystem is a segment of the biosphere consisting of a community of living beings and the abiotic or physical environment interacting and exchanging materials between them.
A community is a group of potentially interacting species living in the same region.
A community is a group of potentially interacting species living in the same region.
MCQ 1601 Mark
The diagram represents the flow of substances within a balanced ecosystem. The boxes are various trophic levels. Which box represents the producers?
- A$B$
- B$D$
- ✓$A$
- D$C$
Answer
View full question & answer→Correct option: C.
$A$
A box represents the primary trophic level which is producer in an ecosystem. Because of two reasons :
- They are highest in number.
- They provide energy for the beginning of a food chain.