Home
Class 12
BIOLOGY
A: Cattle or goat never graze on Calotro...

A: Cattle or goat never graze on Calotropis.
R: Thorms are present as a morphological means of defence.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion

B

It both Assertion & Reason are true but the reason is not the correct explanation of the assertion

C

If Assertion is true statement but Reason is false

D

If both Assertion and Reason are false statements

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the assertion and reason provided, we will analyze both statements step by step. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "Cattle or goat never graze on Calotropis." - This implies that there is something about Calotropis that deters these herbivores from consuming it. 2. **Analyzing the Reason**: - The reason given is "Thorns are present as a morphological means of defense." - This suggests that the presence of thorns on Calotropis serves to protect it from being eaten by herbivores. 3. **Evaluating the Assertion**: - Calotropis is known to produce toxic compounds, specifically cardiac glycosides, which are harmful if ingested by animals like cattle and goats. - This toxicity is a significant reason why these animals avoid grazing on Calotropis. Therefore, the assertion is true. 4. **Evaluating the Reason**: - While it is true that many plants have thorns as a form of defense, Calotropis primarily relies on its chemical defenses (toxins) rather than thorns. - The presence of thorns may provide some level of protection, but it is not the primary reason why cattle and goats do not graze on it. Thus, the reason is false. 5. **Conclusion**: - Both the assertion and reason are evaluated. The assertion is true, but the reason provided does not correctly explain the assertion. - Therefore, the correct answer is that the assertion is true, but the reason is false. ### Final Answer: - Assertion (A) is true: Cattle or goat never graze on Calotropis. - Reason (R) is false: Thorns are present as a morphological means of defense. ---
Promotional Banner

Topper's Solved these Questions

  • ORGANISMS AND POPULATIONS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-C) (Previous Years Questions)|66 Videos

  • NEURAL CONTROL AND COORDINATION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment SECTION - D (Assertion-Reason Type Questions )|10 Videos

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment(section D)|10 Videos

Similar Questions

Explore conceptually related problems

Cattle or goats are never browsing on calotropis growing in abandoned fields because of the presence of

The total energy of molecules is divided equally amongst the various degrees of freedom of a molecule. The distribution of kinetic energy along x, y, z axis are E_(K_(x)), E_(K_(y)), E_(K_(z)) Total K.e =E_(K_(x)) + E_(K_(y)) + E_(K_(z)) Since the motion of molecule is equally probable in all the three directions, therefore E_(K_(x)) = E_(K_(y)) = E_(K_(z)) =1/3 E_(K) =1/3 xx 3/2 kT = 1/2 kT , where k =R/N_(A) = Botzman constant. K.E. = 1/2 kT per molecule or =1/2 RT per mole. In vibration motion, molecules possess both kinetic energy as well as potential energy. This means energy of vibration involves two degrees of fiuedom. Vibration energy =2 xx 1/2kT =2 xx 1/2RT [ therefore two degrees of freedom per mole] If the gas molecules have n_(1) translational degrees of freedom, n_2 rotational degrees of freedom and n_(3) vibrational degrees of freedom, that total energy = n_(1)[(kT)/2] + n_(2) [(kT)/2] + n_(3) [(kT)/2] xx 2 Where 'n' is atomicity of gas. How many total degrees of freedom are present in H_(2) molecules in all types of motions ?

Why you never see cattle or goats browsing on weed Calotropis ?