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Which of the following statements is inc...

Which of the following statements is incorrect about the circulatory system of earthworm?

A

Pheretima represents a closed type of blood vascular sysmte

B

Blood glands are present in 4th, 5th, and 6th segments, they produce blood cells and haemoglobin dissolved in plasma

C

There are fours pairs of hearts in earthworm present in 7,9,12 and 13 segment

D

in dorsal vessel blood flows in forward direction and is without valves

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The correct Answer is:
D
in dorsal vessel blood flows in forward direction and is without valves
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AAKASH INSTITUTE ENGLISH-STRUCTURAL ORGANISATION IN ANIMALS (CONTD . . .) (ANIMAL MORPHOLOGY)-Assignment (Section-B)
  1. Which of the following are analogous to vertebrate liver cells ?

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  2. In earthworm, typhlosole extends between 26th and 35th segments. Its f...

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  3. Which of the following statements is incorrect about the circulatory s...

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  4. Tastes in earthworm are present in the segments

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  5. During copulation in earthworms, sperms are transferred between copula...

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  6. All the following statements are correct about the reproductive system...

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  7. The flow of blood in the dorsal blood vessel of earthworm is

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  8. In Pheretima, clitellum is primarily meant for

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  9. Lateral oesophageal hearts in earthworm connect

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  10. Flow of blood in the ventral vessel of earthworm is

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  11. The ventral surface of mature earthworm can be distinguished from dors...

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  12. Which of the following parts of gut occupies most part of the 8th segm...

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  13. Photoreceptors (phaosomes) in earthworm occur in

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  14. By which of the following nephridia excretion is exonephric?

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  15. Earthworm is

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  16. Pharyngeal nephridia of Pheretima are found in segments

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  17. Periplaneta americana and Blatta orientalis differ mainly from each ot...

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  18. In cockroach, the body in spite of being covered by an exoskeleton of ...

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  19. Wings are vestigial in (a) Male Blatta (b) Female Blatta (c) Male ...

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  20. In cockroach, elytra are articulated to the tergiles of (a) Prothorax...

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