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The median dark line on the mid dorsal p...

The median dark line on the mid dorsal part of the body of earthworm indicates  

A

Dorsal pores

B

Nerve cord

C

Dorsal blood vessel

D

Ventral blood vessel

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The dark lines in the solar spectrum are due to

    A
    Absorption of certain wavelengths by elements present in the outer layer
    B
    Absence of certain elements in the sun
    C
    Black body radiation from the sun
    D
    Scattering of light

  • Testes are attached to dorsal body wall of kidney by

    A
    mesovarium
    B
    mesorchium
    C
    mesothelium
    D
    all the above

  • If a cone is cut into two parts by a horizontal plane passing through the mid point of the axis, the ratio of the volumes of the upper part and the cone is

    A
    `1:2`
    B
    `1:4`
    C
    `1:6`
    D
    `1:8`

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