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Yashraj Deshmukh from Sahyadri English School, Loha, Nanded
Subject :Biology    Class : Class 7

In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Of the statements, mark the correct answer as
Assertion : All food chains are linked; if any one food chain is disturbed, it affects other food chains.
Reason : In a food chain, energy and nutrients are passed on from one organism to another.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If both assertion and reason are false.

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Yashraj Deshmukh from Sahyadri English School, Loha, Nanded
Subject :Biology    Class : Class 7

In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Of the statements, mark the correct answer as
Assertion : Organic impurities of sewage include human and animal excreta, urea (of urine), oil etc. Reason : Inorganic impurities of sewage include micro-organisms that cause water-borne diseases.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If both assertion and reason are false.

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Parth Venkat Aglawe from Kilbil National School Ahamadpur, Nanded
Subject :Biology    Class : Class 7

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Yashraj Deshmukh from Sahyadri English School, Loha, Nanded
Subject :Biology    Class : Class 7

Case study : Different organisms have different ways in which exchange of gases occurs. Different respiratory organs are skin, lungs, gills and some animals even respire through tiny holes. Students were asked to observe the aquarium and identify the method of breathing in aquatic organisms.

What is required by the organisms to survive in aquarium for longest possible time?

A Nitrates
B Oxygen
C Sunlight
D Carbon dioxide


Ans 1:

Yashraj Deshmukh   from Sahyadri English School, Loha, Nanded
Class : Class 7
HI

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Aprameyan from Abheek, Bangalore Urban
Subject :Biology    Class : Class 7

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Aprameyan from Abheek, Bangalore Urban
Subject :Biology    Class : Class 7

Ans 1:

Vivek Nagnath Wadhvane   from PINNACLE CBSE SCHOOL NANDED, NANDED
Class : Class 7
i think so that the answer must be B

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GULNAZ ASHRAF CHOUGLE from Podar, NAVI MUMBAI
Subject :Biology    Class : Class 8

Assertion : Atmospheric nitrogen is always fixed by nitrogen-fixing microorganisms.
Reason : They convert ammonia present in atmosphere to nitrites and nitrates.
In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the four statements, given below, mark one as the correct answer

A if both Assertion and Reason are true and Reason is the correct explanation of Assertion
B if both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C if Assertion is true but Reason is false
D if both Assertion and Reason are false.


how?

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Divita Saxena from BVM Ashti, nagpur (Maharashtra)
Subject :Biology    Class : Class 7

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Aatmaj and Veeha from HAPS hamirpur, HP, Hamirpur, HP
Subject :Biology    Class : Class 6

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion : Plants do not take in nitrogen.
Reason : Nitrogen is harmful for plants.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If assertion is false but reason is true.


Is this answer right

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Dhriti from EIS, Pune
Subject :Biology    Class : Class 6

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion : Water lily plant has small, thin and needle like leaves.
Reason : Water lily is a submerged aquatic plant.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If assertion is false but reason is true.


the ans should be: both of them are false

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