Classification

CLASSIFICATION

CLASSIFICATION Phylum Arthropoda 1. They show metamerism. It is modified by the specialization of body regions for specific functions (tagmatization). 2. Chitinous exoskeleton provides support and protection. It is modified to form sensory structures. 3. They have paired jointed appendage. Phylum arthropoda have four

CLASSIFICATION

CLASSIFICATION 1. Class Caudofoveata 1.They are wormlike molluscs. 2. They have cylindrical, shell-less body and scale like, calcareous spicules. 3. They lack eyes, tentacles, statocysts. crystalline style, foot, and nephridia. 4. They are deep-water, marine burrowers. Examples: Chaetoderma 2. Class Aplacophora 1.They lack shell,

CLASSIFICATION

CLASSIFICATION Phylum platyhelminthes has four classes: (a)    Class Turbellaria They have over 3, 000 species. They are free-living and aquatic External surface is ciliated. They are predators. They possess rhabdites, protrusible proboscis, frontal glands and many mucous glands. Mostly hermaphroditic. Examples: Convoluta,  Notoplana, Dugesia.

CLASSIFICATION

CLASSIFICATION Phylum coelentrata has four classes: 1. Class Hydrozoa Hydrozoans are small common cnidarians. Most of the cnidarians are marine. But this class of cnidarians has also freshwater species. Most hydrozoans show alternation of generations. However, in some cases the medusa stage is lost.

SHORT QUESTIONS OF CLASSIFICATION

1.Define Classifcation Ans: The arrangement of plants into groups and sub-groups on the basis of similarities is called classification. The characters which are uses as basis of classification are called criteria of classification. 2.What are criteria of classification? Ans: The major criteria of classification

CLASSIFICATION OF ORGANISM

CLASSIFICATION OF ORGANISM The study of kinds and diversity of organisms and the evolutionary relationships among them is called systematics or taxonomy. The study of systematics gives the order and relationships among the organisms. This relationship arises from e evolutionary processes. These studies also

Classification

The arrangement of plants into groups and sub-groups on the basis of similarities is called classification. The characters which are uses as basis of classification are called criteria of classification. The major criteria of classification are morphology, anatomy, Palynology (study of pollen grains), Karyo