Download App

Our Environment — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceOur Environment1 Mark
MCQ
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The energy available to deer in a food chain is more as compared to that available to lion.
Reason : Deer occupies second trophic level whereas lion occupies first trophic level in a food chain operating in grassland ecosystem.
  • A
    Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
  • B
    Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
  • ✓
    $A$ is true, but $R$ is false.
  • D
    $A$ is false, but $R$ is true.
✓

Answer

Correct option: C.
$A$ is true, but $R$ is false.
Deer occupies second trophic level in a food chain as it is primary consumer and directly feeds on plants. Lion occupies higher trophic level as it is a top carnivore and acts as secondary or tertiary consumers. Energy available to deer will be higher as compared to lion, as energy keeps on decreasing from one trophic level to another due to loss as heat.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion - Reasoning (1 Marks)" from Our Environment→Our Environment — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The $200W$ bulbs glows with more brightness than $100W$ bulbs.
Reason : A $100$ watt bulb has more resistance than a $200W$ bulb.
→
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Endocrine glands are called ductless glands.
Reason : These glands direct pour their secretions into the blood.
→
For two statements are given $- $ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The plants store some of the waste products in their body parts.
Reason : Raphides are the solid waste products of plants.
→
For two statements are given$-$ one labelled
Assertion $(A)$ and the other labelled
Reason $(R)$. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below:
Assertion: If blood group of both mother and father is $'O'$ then the blood group of children will also be $O .$
Reason: Blood group in humans is determined by many alleles of a gene viz. $1^{ A }, 1^{ B }, 1^{ D }$.
→
Assertion (A): Sex of the children will be determined by what they inherit from their mother.
Reason (R): Women have XX sex chromosomes.
→
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Using jute bags while shopping is more environment friendly as compared to polythene bags.
Reason : Jute is biodegradable, whereas polythene bag is non $-$ biodegradable.
→
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Iron articles are painted so as to prevent them from rusting.
Reason : When the surface of iron is coated with paint, its surface does not come in contact with oxygen and moisture therefore rusting does not take place.
→

Assertion (A): The magnitude of the magnetic field at a point on the axis of a current-carrying solenoid is inversely proportional to the current flowing through the solenoid. 
Reason (R): The magnitude of the magnetic field at a point on the axis of a current-carrying solenoid is directly proportional to the number of turns per unit length of a solenoid. 

→
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Recycling is the way of managing plastic waste.
Reason : Broken plastic articles are sent to plastic processing units, where they are melted and remolded to make new plastic art ides.
→
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Light is able to reach earth from the sun.
Reason : Light rays can travel in vaccum.
→