Write one characteristic feature of each of the following groups of organisms:
(a) Cryptogam
(b) Arthropoda
(c) Mammals
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(a) These bear no flowers, seeds, and fruits. These reproduce vegetatively, asexually and sexually. Vegetative reproduction takes place cell division or fragmentation. Asexual reproduction takes place by the means of spores.
(b) They can be found in all types of habitats – land, water and soil. They have jointed limbs. The body is segmented into three regions – Head, Thorax and Abdomen. The body cavity is filled with blood and is called the haemocoel.
(c) Have hair and fur on the body. Have mammary glands. Four chambered hearts. Have sebaceous (fat secreting glands), sudoriferous (sweat), and scent glands.
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