DIAGRAM BASED QUESTIONS
BIOLOGY
Q1. Observe the figure given below. The name of the part ‘X’ and its function is
(A) Neuron; transmits chemicals as electrical impulses
(B) synapse; transmits electrical signals generated at the axon terminal to the dendrite
(C) Neuron; transmits electrical impulses as chemicals
(D) synapse; transmits chemical signals generated at the axon terminal to the dendrite
Ans: (D) synapse; transmits chemical signals generated at the axon terminal to the dendrite
Q2. Observe the tropisms of plants expressed in the following figures A and B. What is the difference between the movements of these plants?
Ans:
Plant A : Nastic moment
Plant B : Trophic moment
Q3. A scientist cuts planaria as shown in the figure below. After regeneration how many planaria will remain here ?
Ans: One
Q4. Observe the structure given in the following figure. The type of tropic movement that helps the movement of ‘C’ towards ‘B’ here is,
(A) Phototropism
(B) Chemotropism
(C) Geotropism
(D) Hydrotropism
Ans: (B) Chemotropism
Q5. Observe the following figures. Which figure represents low rate of gaseous exchange ? Why ?
Ans:
Figure (a) represents a low rate of gaseous exchange because the stomatal pore is closed.
Q6. Observe the processes depicted in the given figures. Among the progenies, which of the process (i) causes variations ? (ii) causes similarities ?
(i) Variations: Figure 2
(ii) Similarities: Figure 1
Q7. Observe the figure below. The characteristic and function of the structure ‘X’ are respectively
(A) wall is absent and pollinates.
(B) it has a thick wall and grows into a new rhizopus.
(C) it has a thin wall and grows into a new rhizopus.
(D) it has a thick wall and pollinates.
Ans: (B) it has a thick wall and grows into a new rhizopus.
Q8. Observe the female reproductive structures given in figure A and figure B. The correct statement related to these figure is
(A) Fertilization of egg is possible in both of the structures
(B) Fertilization of egg is possible only in the structure of figure-B
(C) Fertilization of egg is possible only in the structure of figure-A
(D) Fertilization of egg is not possible in both of the structures
Ans: (C) Fertilization of egg is possible only in the structure of figure-A
Q9. Schematic representation of blood circulation in the mammals is given below
i) Name the blood vesseles ‘x’ and ‘y’
ii) Which blood vessel has valves ?
Ans. :
i) x = Artery y = Vein
ii) Vein has valves.
Q10. Diagrams given below represent hearts of three different animals. Observe it and answer the question.
Among these, which heart is helpful to the animals that require more energy ? Why ?
Ans:
★ Heart - 2
★ Oxygenated and deoxygenated blood will not mix together Efficient supply of oxygen to the body. Helpful to maintain body temperature.
Q11. Name the given structure. What is its general function ? Mention the function of the parts labelled as A and B. These structures in animals are said to be efficient ways to give quick responses. Why ?
Ans:
★ Reflex arc
★ It gives sudden action in response to the event happening in the environment.
A) Sensory neuron : It conducts the impulse of stimulus from receptor to the spinal cord.
B) Effectors : Which shows the sudden visible response. Reflex arcs have evolved in animals because the thinking process of brain is not fast enough in many animals. Mean while many animals have very little of the complex neuron network needed for thinking.
So it can function in the absence of true thought process and increase the chance of survival.
Q12. In the given figure of Cotyledon the parts labelled as A and B respectively are
(A) fruit, shoot
(B) primary shoot, primary root
(C) secondary root, primary shoot
(D) bud, leaf.
Ans: (B) primary shoot, primary root
Q13. Biological process that has been shown in the diagram is
(A) production of progenies by fragmentation method
(B) production of progenies by multiple fission method
(C) regeneration of tissues by development in specialised cell
(D) asexual reproduction by vegetative propagation.
Ans. :
(C) regeneration of tissues by development in specialised cells
Q14. The flower that can undergo self pollination among below given figures of flower is
(A) ‘P’ only Total
(B) ‘R’ only
(C) Both ‘P’ and ‘R’
(D) ‘Q’ only
Ans. : (D) ‘Q’ only
Q15. Observe the figures of flowers given below :
Name the types of pollination that can occur in these two flowers. (May 2025)
Ans. :
Flower A : Self pollination.
Flower B : Cross pollination
Q16.
The reproduction methods expressed in both of the above figures are similar or different from each other? Write the justification to your answer.
Ans : The reproduction methods expressed in both of the above figures are different from each other.
Spirogyra:
★Spirogyra reproduces by fragmentation
★ breaks up into smaller pieces upon maturation and these pieces grow into new individuals.
Planaria:
★ Planaria reproduces by regeneration.
★can be cut into any number of pieces and each piece grows into a complete organism.
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