MEDIUM
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Identify the wrong statements w.r.t. the digestive system of Pheretima?

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Important Questions on Structural Organisation in Animals

MEDIUM
Following are the statements about prostomium of earthworm.
(a) It serves as a covering for the mouth.
(b) It helps to open cracks in the soil into which it can crawl.
(c) It is one of the sensory structures.
(d) It is the first body segment.
MEDIUM

In the given diagram of the digestive system of earthworm, identify parts labelled as1, 2 ,3, 4 & 5 and select the correct option ?

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EASY
The following are the various parts of reproductive system of Pheretima.
A. Testes
B. Accessory glands
C. Spermathecae
D. Ovaries
Arrange them in a correct sequence from anterior end to posterior end.
EASY

Match the following features to the animals. Which is the correct combination?

1. Open circulatory system

2. Closed circulatory system

3. Earthworm

4. Malpighian tubules

5. Nephridia

6. Cockroach

MEDIUM
In  Pheretima , there are red coloured round bodies in  4th, 5th and 6th segments above the alimentary canal. They are believed to be involved in
EASY
Which part of the alimentary canal of earthworm (in the given figure) helps in grinding the soil particles?
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MEDIUM

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

MEDIUM
Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
MEDIUM
If the dorsal pores of the earthworm are blocked, then which of the following functions are affected first?
MEDIUM
The figure showing the nephridial system of earthworm is given here. Identify the types of nephridia labeled as A, B, and C from the list (i) to (iii) given below and select the correct option.
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(i) Septal nephridia
(ii) Integumentary nephridia
(iii) Tufts of pharyngeal nephridia
EASY
A median mid-dorsal line along the longitudinal axis of the body of earthworm is represented by:
EASY
Which of the following is an incorrect statement w.r.t. circulatory system of Pheretima?