Which of the following organism synthesises carbohydrates from inorganic compounds using radiant energy?

• decomposers

• producers

• herbivores

• carnivores

Answer explanation

Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called decomposers.

Tags

NGSS.MS-LS1-6

The reason of limitation for number of trophic levels in a food chain is ___________

• Water

• Sufficient food supply

• Polluted air

• Decrease in energy at higher trophic levels

Answer explanation

The reason of limitation for number of trophic levels in a food chain is decrease in energy at higher trophic levels.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Choose the correct option that shows tropical level with maximum available energy.

• T4

• T2

• T1

• T3

Answer explanation

As we know that energy decreases from lower to higher trophic levels. Thus the lowest trophic level will have highest energy. Hence T1 is at higher energy level so option 3 is correct answer.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Why we should not use disposable plastic plates?

• They are made of materials with light weight

• They are made of toxic materials

• They are made of biodegradable materials

• They are made of non-biodegradable materials

Answer explanation

We should not use disposable plastic plates because they are made of non-biodegradable materials.

Which of the following is not a waste management technique?

• Reuse

• Eutrophication

• Recycle

• To make compost

Answer explanation

Eutrophication is not a waste management technique.

Which of the following is example of transfer of energy from primary consumer to secondary consumer?

• Plant is eaten by grasshopper

• Frog is eaten by snake

• Grasshopper is eaten by frog

• Snake is eaten by eagle

Answer explanation

As grass is producer and grasshopper eats grass hence it a primary consumer and frog eats grasshopper hence it a secondary consumer. Option 3 is correct answer.

Tags

NGSS.MS-LS2-3

Which of the following is not a problem caused to plants by the ultra violet rays ?

• Growth

• Problem in photosynthesis

• Problem in flowering

• problem in roots

Answer explanation

Problem in roots is not a problem caused to plants by a ultra violet rays from ozone layer depletion.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

Find the odd one out with respect to biotic and abiotic components

• Water

• Microorganisms

• Soil

• Minerals

Answer explanation

Microorganisms are biotic components. Water, soil and minerals are abiotic components.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following is not responsible for depletion of ozone layer?

• Chloroform

• Halon

• Methyl bromide

• Ethene

Answer explanation

Ethene is not responsible for depletion of ozone layer, all others are responsible for depletion of ozone layer. Hence option 4 is correct

Grass → Deer → Tiger is the given food chain. Choose correct option showing the effect if deer is missing in the given food chain.

• The population of tiger increases

• The population of grass decreases

• Tiger will start eating grass

• The population of tiger decreases and the population of grass increases

Answer explanation

As deer is missing from food chain then tiger would not eat grass hence population of tiger decreases and population of grass increases.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4