EASY
Earn 100
The septal nephridia of earthworm pours wastes into _________.
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Important Questions on Structural Organisation in Animals
EASY
Match the following features to the animals. Which is the correct combination?
Open circulatory system
Closed circulatory system
Earthworm
Malpighian tubules
Nephridia
Cockroach
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
One very special feature in the earthworm is that
MEDIUM
The chromophil cells of the pharynx in earthworm:
MEDIUM
Which of the following is an incorrect statement?
MEDIUM
Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
EASY
________segments of Pheretima has clitellum.
MEDIUM
Which of the following statements is correct about excretion in earthworms?
(i) Earthworm is mainly ureotelic.
(ii) Septal nephridia, present on both sides of intersegmental septa of segment 15 to the last, open into the intestine.
(iii) Integumentary nephridia, attached to the lining of the body wall of segment 3 to the last, open on the body surface.
(iv) Different types of nephridia are basically similar in structure.
(v) Nephridia regulate the volume and composition of body fluids.
EASY
The intestine of earthworm has a pair of short and conical intestinal caeca projecting out from segment
EASY
In earthworm, nephridia are present in all segments of the body except
MEDIUM
Identify the wrong statement w.r.t. earthworm.
MEDIUM
Identify the correct labelling of the diagram given below.
EASY
Which of the following structures serve as a covering of mouth and as a wedge to force open cracks in soil in which earthworm may crawl?
EASY
In earthworm, setae are made up of
EASY
and its close relatives derive nourishment from
EASY
The chloragogen cells of coelomic fluid in earthworm are analogous with ________ of vertebrates.
HARD
Consider the following statements:
(i) The body wall of an earthworm is covered externally by a thin, non-cellular cuticle, below which lies epidermis.
(ii) The epidermis of an earthworm is made up of a single layer of columnar epithelial cells which contain secretory gland cells.
(iii) The setae are present in all segments of the body of earthworm.
(iv) Septal nephridia are present in first 14 segments in Pheretima.
Which of the above statements are correct?
MEDIUM
If the dorsal pores of the earthworm are blocked, then which of the following functions are affected first?
EASY
Cotyledons are also called-
EASY
An important structure present is the 8th segment of Pheretima that helps in crushing food is:
