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Blood of earthworm is confined to heart and blood vessels. What could be the reason?

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Important Questions on Classification

EASY
Science>Biology>Classification>Classification of Animals
Which of the following options does correctly represent the characteristic features of phylum Annelida?
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Science>Biology>Classification>Classification of Animals
Select the taxon that represents both marine and freshwater species.
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Science>Biology>Classification>Classification of Animals
Which one of these animals is not a homeotherm?
EASY
Science>Biology>Classification>Classification of Animals
Which one of the following characteristics is not shared by birds and mammals?
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Science>Biology>Classification>Classification of Animals
Which of the following characteristics is mainly responsible for the diversification of insects on land?
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Science>Biology>Classification>Classification of Animals
Animals of this class in Annelida have definite number of segments.
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Science>Biology>Classification>Classification of Animals
Water vascular system is found in ___.
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Science>Biology>Classification>Classification of Animals
Match the type of cells given in Column I with organisms given in Column II. Choose the appropriate combination from the options below.
 
Column-I Column-II
P Flame cells i Sponges
Q Collar cells ii Hydra
R Stinging cells iii Planaria
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Science>Biology>Classification>Classification of Animals
An important characteristic that Hemichordates share with Chordates is
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Science>Biology>Classification>Classification of Animals
In the case of Poriferans, the spongocoel is lined with flagellated cells called
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Science>Biology>Classification>Classification of Animals
Which of the following features is not present in the phylum Arthropoda?
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Science>Biology>Classification>Classification of Animals
The chitinous exoskeleton of arthropods is formed by the polymerization of:
MEDIUM
Science>Biology>Classification>Classification of Animals
Write one name of bisexual animal.
MEDIUM
Science>Biology>Classification>Classification of Animals
The following are the various external apertures in Pheretima
A) Male genital apertures
B) Spermathecal apertures
C) Nephridiopores
D) Female genital aperture
Arrange the apertures in a correct sequence from the anterior end to the posterior end
EASY
Science>Biology>Classification>Classification of Animals
Which of the following animals does not undergo metamorphosis?
MEDIUM
Science>Biology>Classification>Classification of Animals
Match the following organisms with their respective characteristics:
  Column – I   Column – II
(a) Pila (i) Flame cells
(b) Bombyx (ii) Comb plates
(c) Pleurobrachia (iii) Radula
(d) Taenia (iv) Malpighian tubules

Select the correct option from the following:
EASY
Science>Biology>Classification>Classification of Animals
In which one of the following phyla is the body segmented?
EASY
Science>Biology>Classification>Classification of Animals
Which one of the following living organisms completely lacks a cell wall?
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Science>Biology>Classification>Classification of Animals
Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum:
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Science>Biology>Classification>Classification of Animals
Metagenesis refers to: