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Read the following statements and select...

Read the following statements and select the true ((T)) or false ((F)) statement .
A. The notochord is an ectodermal derived rod-like structure in chordates.
B. Platyhelminthes are triploblastic and pseudocoelomate animals.
C. The alternation of generation in Obelia is called Metagenesis .
D. In ctenophora , only sexual mode of reproduction is observed.

A

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

B

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

C

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

D

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

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to evaluate each statement individually and determine whether they are true (T) or false (F). ### Step-by-Step Solution: 1. **Statement A:** "The notochord is an ectodermal derived rod-like structure in chordates." - The notochord is actually a mesodermal structure, not ectodermal. It is a rod-like structure that provides support in chordates. Therefore, this statement is **False (F)**. 2. **Statement B:** "Platyhelminthes are triploblastic and pseudocoelomate animals." - Platyhelminthes, or flatworms, are indeed triploblastic, meaning they have three germ layers (ectoderm, mesoderm, and endoderm). However, they are acoelomate, not pseudocoelomate. Therefore, this statement is also **False (F)**. 3. **Statement C:** "The alternation of generation in Obelia is called Metagenesis." - Metagenesis refers to the alternation of generations, which is observed in Obelia. It involves a cycle between the polyp and medusa forms. Therefore, this statement is **True (T)**. 4. **Statement D:** "In ctenophora, only sexual mode of reproduction is observed." - Ctenophores (comb jellies) primarily reproduce sexually, but they can also reproduce asexually in some cases. Therefore, this statement is **False (F)**. ### Final Evaluation: - A: F - B: F - C: T - D: F ### Summary of Answers: - A: False (F) - B: False (F) - C: True (T) - D: False (F)
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