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Fertilization/Syngamy

Flame cells a...

Question

Flame cells and metagenesis are found respectively in

A

Taenia and Hydra

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B

Ascaris and Starfish

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C

Taenia and Obelia

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D

Earthworm and Obelia

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Solution

The correct option is C Taenia and Obelia
The flame cell is a special excretory cell present in Taenia (tapeworms). The cilia of flame cells propel waste through a tubule formed by a tube cell. Metagenesis is the alternation of generations between sexual and asexual reproduction. In obelia, metagenesis is seen, where asexual polyploid generation is seen in alternation with the sexual medusoid stage.
So, the correct answer is 'Taenia and Obelia'.

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Similar questions

Q. Assertion [A]: Obelia exhibits metagenesis.
Reason [R]: Obelia exists in both polyp and medusa form.

Q. Which of the following pairs are correctly matched?

	Animals		Morphological features
(i)	Crocodile	-	4-chambered heart
(ii)	Sea urchin	-	Parapodia
(iii)	Obelia	-	Metagenesis
(iv)	Lemur	-	Thecodont

Q. Read the following statements and choose the correct options
I. Pelvic fins of female sharks bear claspers.
II. In Obelia polyps produce medusae sexually and medusae asexually.
III. Flame cells in platyhelmintes help in osmoregulation and excretion.
IV. In nonchordates, central nervous system is ventral, solid and double.
V. Pinnae are present in mammals.

Q. Which of the following pairs are correctly matched

	Animals		Morphological features
(A)	Crocodile	-	4-Chambered heart
(B)	Sea Urchin	-	Parapodia
(C)	Obelia	-	Metagenesis
(D)	Lemur	-	Thecodont

Q. Identify the pairs that are correctly matched.

(i)	Crocodile	Four chambered heart
(ii)	Sea urchin	Parapodia
(iii)	Obelia	Metagenesis
(iv)	Chondrichthyes	Placoid scales

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