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• Presence of tactile receptors (receptors of touch), gustatoreceptors (receptors of taste), photoreceptors (sensitive to lig ...

Class archiannelida • It includes about one dozen genera of small, marine worms of unknown affinities. • Segmentation chie ...

Table : Important examples of Phylum Annelida Scientific name Common name Important features Class-Polychaeta Nereis Sand worm o ...

Class-Oligochaeta Pheretima posthuma Earthworm • It is commonly found in South-East Asia, japan, Sri Lanka and Australia and is ...

• There are four pairs of small flask-shaped structures, called spermathecae or receptacula seminales, one pair in each of th ...

Phylum arthroPoda • Phylum Arthropoda (Gk. arthros = joint + Podos = foot) is the largest phylum of Kingdom Animalia. • Th ...

• Excretory product is ammonia/urea in aquatic forms and uric acid in terrestrial species. nervous system • Nervous system ...

system of classification of arthropods exists. The classification adopted here is a synthesis of several views. • According t ...

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• Some structural and biological patterns which have contributed to the big biological success of arthropods are : Thick chi ...

Class Character Crustacea Chilopoda(Centipedes) Diplopoda(Millipedes) Insecta (Largest class in animal kingdom) Arachnida Merost ...

Egg Mature adult Aquatic naiad Aerial imago Gradual metamorphosis or paurometabolous development : In this type of metamorphosi ...

The group of triploblastic animals with jointed appendages, bilateral symmetry, having open circulatory system and possess ante ...

(a) A-(iii), B-(i), C-(iv), D-(ii) (b) A-(i), B-(iii), C-(iv), D-(ii) (c) A-(iv), B-(ii), C-(i), D-(iii) (d) A-(ii), B-(iii), C- ...

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Which of the following sentences is correct? (a) In prokaryotes there are no membrane bound cell organelles. (b) Cells of all l ...

(a) (A) - r, (B) - s, (C) - p, (D) - q (b) (A) - q, (B) - s, (C) - p, (D) - r (c) (A) - q, (B) - p, (C) - s, (D) - r (d) (A) - s ...

The function of a selectable marker is (a) eliminating transformants and permitting non-transformants (b) identify ori site (c) ...

(b) Energy is saved because glycolysis and the citric acid cycle shuts down. (c) Pyruvate is converted to lactic acid by anaerob ...

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