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[A] : All the gills of Palaemon are phyl...

[A] : All the gills of Palaemon are phyllobranchs .
[R] : Each gill consists of two rows of leaf like rhombodial gill-plates arranged like the leaves of a book .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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TRUEMAN BIOLOGY-Animal Kingdom -ASSERTION AND REASON
  1. [A] : Presence of alimentary canal would not have suited the mode of l...

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  2. [A]: Development in cockroach is termed as retrogressive metamorphosis...

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  3. [A] : All the gills of Palaemon are phyllobranchs . [R] : Each gill ...

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  4. [A] : Renal-sac of Prawn functions in same manner as vertebrate kidney...

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  5. [A] : Pila is adopted to lead an amphibious life . [R] : It is provi...

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  6. [A] : Chordates have poor regeneration power while non-chordates have ...

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  7. [A] : In lower invertebrates the digestion is intracellular while in h...

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  8. [A] : Chordates have an oxygen carrying pigment called haemoglobin . I...

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  9. [A] : Huxley comments that Birds are glorified reptiles . [R] : Bird...

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  10. [A] : Birds excrete uric acid . [R] : Birds do not have a urinary b...

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  11. [A] : In elastic lungs of birds are supplemented by remarkable system ...

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  12. [A] : Sphenodon is referred to as a living fossil . [R] : It has ret...

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  13. [A] : In reptiles , lizards show autotomy . [R] : Tail of most lizar...

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  14. [A] : Heloderma is called beaded lizard . [R] : Its scales resemble ...

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  15. Assertion: Krait is poisonous snakes. Reason: Belly scales are small...

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  16. [A] : In the adult bird , only the left ovary is well developed . [R...

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  17. [A] : Rabbit is classified as mammal . [R] : Rabbit possesses mammar...

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  18. [A] : Origin of mammals is polyphyletic . [R] : Mammals are derived...

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  19. [A] : The Ascidian tadpole larva possess all the basic chordate charac...

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  20. [A] : Tail wagging dance is performed for short distances . It conveys...

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