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Organisms showing internal fertilisation...

Organisms showing internal fertilisation

A

Are majority of algae, fishes and amphibians

B

Have syngamy inside the female body

C

produce motile male gametes always

D

produce equal number of male and female gametes

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Organisms exhibiting external fertilisation

Why do gametes are produced in large numbers in organisms exhibit external fertilisation ?

Given below are a few statements related to exgternal fertilisation. Choose the correct statements. (i) The male and female gametes are formed and released simultaneously. (ii) Only a few gametes are released into the medium. (iii) Water is the medium in a majority of organisms exhibiting external fertilisation. (iv) Offspring formed as a result of external fertilisation have better chance of survival than thos formed inside an organism.

Given below are a few statements related to external fertilisation. Choose the correct statements. (i) The male and female gametes are formed and released simultaneously. (ii) Only a few gametes are released into the medium. (iii) Water is the medium in a majority of organisms exhibiting external fertilisation. (iv) Offspring formed as a result of external fertilisation have better chance of survival than those formed inside an organism.

Internal fertilisation occurs in

The statements given below shows some characteristics of a phylum. Identify it. (i) Tissue absent (ii) Internal fertilisation (iii) Developments is indirect (iv) Spongocelate with ostia (many) and single osculum and cancal system (v) Sexes are hermaphrodite.

External fertilisation is found in

Assertion : Living organisms show internal as well as external growth. Reason : Living organism undergo the process known as accretion.

What is fertilisation?

Double Fertilisation