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In Hirudinaria...

In Hirudinaria

A

male and female genital pores are present between 2nd and 3rd annuali of 10th and 11th segments

B

fertilisation is external

C

cocoon formation does not take place

D

development is indirect

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The correct Answer is:
A
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Among the statements given below about leech (Hirudinaria granulosa) find out the one which are correct about the organism and select the appropriate code . I. It is sanguivorous in habit . II. It is a hermaphrodite . III . It is narrowest near the anterior end and broadest near the posterior end . IV . Its eggs are deposited in cocoons .

In the external aperture , of body of Hirudinaria granulosa I.mouth is triradiate aperture , opens into preoral chamber of anterior sucker . II.posterior sucker is formed by the complete fusion of last seven body segments . III.anus is present in 31st segment , which is mid-dorsal in position . IV.female genital pores are mid-ventral in position between 3rd and 4th annuli of 11th segment .

Of the statements provided identify the incorrect statements , which are not the characteristic features of leech and select the appropriate code . I . The body of Hirudinaria granulosa is soft , vermiform , elongated and dorsoventrally flat . II. The segments 3rd-26th are further divided into rings of annuli . III . The mouth of leeches is guarded by a structure called velum . IV . The anterior and posterior suckers are meant for adhesion and locomotion .

What is true of Hirudinaria

Hirudinaria shows locomotion by

ARIHANT NEET-ANIMALIA-II (HIGHER INVERTEBRATES) -Chapter Exercises C Medical entrances gallery (Collection of questions Asked in NEET & Various Medical Entrance Exams )
  1. In Hirudinaria

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  2. Choose the correct set of disease transmitting arthropods.

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