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Which is not correct for sponges?...

Which is not correct for sponges?

A

Internal fertilisation

B

External fertilisation

C

Gemmule formation

D

Gametes are formed from epidermal cells

Text Solution

Verified by Experts

The correct Answer is:
B
In sponges, sexes are not separate (hermaphrodite), i.e., eggs and sperms are produced by the same individuals. Sperms leave one sponge and enter another with water current to fertilise the ova (eggs) in situ. Thus, fertilisation is internal.
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NCERT FINGERTIPS-ANIMAL KINGDOM-Animal Kingdom
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  2. Which of the following is not a characteristic feature of sponges?

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  3. Which is not correct for sponges?

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  4. The statements given below shows some characteristics of a phylum. Ide...

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  5. Which of the following statements is correct for sponges without excep...

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  6. Which of the following is not a correct match of animal and its habita...

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  7. Stinging capsules (nematocysts) are found in

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  8. Match the following and select the correct option from the codes gives...

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  9. Which of the following have porous body and are diploblastic?

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  10. Identify the figures A, B, C and D and select the correct option.

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  11. The characters given below are shown by (i) Extracellular and intra...

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  12. Given below are three statements regarding Aschelminthes. (i) They a...

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  13. In which of the following, segmentation in the body is first observed?

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  14. Identify the figures A,B, C and D and select the correct option.

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  15. Match column I with column II and select the correct option from the g...

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  16. Consider the following statements (A-C) each with two blanks. A. Ani...

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  17. Match column I with column II and select the correct option from the g...

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  18. Read the given statements and select the correct option. Statements ...

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  19. What is common between earthworm and Periplaneta?

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  20. Which of the followinf are examples of Arthropoda?

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