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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,T,T,F):}`

B

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

C

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

D

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

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the statements related to the common frog, Rana tigrina, we will evaluate each statement one by one to determine if they are true (T) or false (F). ### Step-by-Step Solution: **Statement A:** "On dry land it would die due to lack of O₂ if its mouth is forcibly kept closed for a few days." - Frogs can breathe through their skin and mouth lining when they are on dry land. However, if their mouth is forcibly closed, they cannot take in air, which can lead to suffocation. Therefore, this statement is **True (T)**. **Statement B:** "It has a four-chambered heart." - Frogs have a three-chambered heart, consisting of two atria and one ventricle. Therefore, this statement is **False (F)**. **Statement C:** "On dry land it turns uricotelic from ureotelic." - Adult frogs excrete urea (ureotelic), while tadpoles excrete ammonia (ammonotelic). The statement suggests that adult frogs would switch to uricotelic on dry land, which is incorrect. They remain ureotelic. Therefore, this statement is **False (F)**. **Statement D:** "Its life-history is carried out in pond water." - Frogs generally breed and develop in aquatic environments such as ponds. Their life cycle, including the tadpole stage, occurs in water. Therefore, 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 ones are true and which ones are false is: **TFFT**.
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