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Consider the following four statements (...

Consider the following four statements `(A-D)` related to the common frog rane tigrina and select the correct option stating which ones are true (T) and which ones are false (F)
Statements :
(A) On dry land it would die due to lack of `O_(2)` of its mouth is farcibly kept closed for a few days
(B) It has four-chambered heart
(C) ON dry land it turns uricotelic from ureotelic
(D) Its life-history is carried out in pond water

A

`{:((A),(B),(C),(D).),(F,F,T,T):}`

B

`{:((A),(B),(C),(D).),(F,T,T,F):}`

C

`{:((A),(B),(C),(D).),(T,F,F,T):}`

D

`{:((A),(B),(C),(D).),(T,T,F,F):}`

Text Solution

AI Generated Solution

The correct Answer is:
To determine the truthfulness of the statements (A-D) regarding the common frog, Rana tigrina, we can analyze each statement step by step. ### Step-by-Step Solution: 1. **Statement A**: "On dry land it would die due to lack of O₂ if its mouth is forcibly kept closed for a few days." - **Analysis**: Frogs can absorb oxygen through their skin. However, if the mouth is forcibly kept closed, they cannot take in air through their lungs, and if they are on dry land, they will not be able to absorb enough oxygen through their skin either. Thus, this statement is **True (T)**. 2. **Statement B**: "It has a four-chambered heart." - **Analysis**: Frogs, including Rana tigrina, have a three-chambered heart, consisting of two atria and one ventricle. Therefore, this statement is **False (F)**. 3. **Statement C**: "On dry land it turns uricotelic from ureotelic." - **Analysis**: Frogs are primarily ureotelic, meaning they excrete nitrogenous waste in the form of urea. They do not switch to uricotelic (excreting uric acid) when on dry land. Therefore, this statement is **False (F)**. 4. **Statement D**: "Its life-history is carried out in pond water." - **Analysis**: Frogs typically reproduce in water, and their life cycle includes aquatic stages (tadpoles). Thus, this statement is **True (T)**. ### Summary of Statements: - **A**: True (T) - **B**: False (F) - **C**: False (F) - **D**: True (T) ### Final Answer: The correct option stating which statements are true and which are false is: - A: T - B: F - C: F - D: T
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