Bilaterally symmetrical and acoelomate animals are exemplified by:

1. Platyhelminthes

2. Aschelminthes

3. Annelida

4. Ctenophora

Subtopic:  Phylum Platyhelminthes |
 78%
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NEET - 2020
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Select the correct statements:
A: Platyhelminthes are triploblastic, pseudocoelomate and bilaterally symmetrical organisms.
B: Ctenophores reproduce only sexually and fertilization is external.
C: In tapeworm, fertilization is internal but sexes are not separate.
D: Ctenophores are exclusively marine, diploblastic and bioluminescent organisms.
E: In sponges, fertilization is external and development is direct.

Choose the correct answer from the options given below:
1. (A), (C) and (D) only 2. (B), (C) and (D) only
3. (A) and (E) only 4. (B) and (D) only
Subtopic:  Phylum Porifera | Phylum Coelenterata | Phylum Ctenophora | Phylum Platyhelminthes |
 67%
From NCERT
NEET - 2023
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Tapeworms are classified in phylum
1. Porifera
2. Cnidaria
3. Platyhelminthes
4. Ctenophora
 
Subtopic:  Phylum Platyhelminthes |
 98%
From NCERT
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Which of the following is not an adaptation to parasitic life?
1. production of a few well-protected eggs
2. hooks
3. suckers
4. reduced digestive system
 
Subtopic:  Phylum Platyhelminthes |
 85%
From NCERT
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Study the Assertion statement followed by the Reason statement given below:
Assertion (A): The digestive system in Platyhelminthes is called incomplete.
Reason (R): Platyhelminthes are mostly endoparasites found in animals including human beings.
 
1. (A) is True but (R) is False.
2. Both (A) and (R) are True and (R) is the correct explanation of (A).
3. Both (A) and (R) are True but (R) is not the correct explanation of (A).
4. (A) is False but (R) is True.        
Subtopic:  Phylum Platyhelminthes |
 68%
From NCERT
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Members of Phylum Platyhelminthes typically have bodies that are ____ compressed.
1. dorso-laterally
2. bilaterally
3. ventro-laterally
4. dorso-ventrally
Subtopic:  Phylum Platyhelminthes |
 88%
From NCERT
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