Question

Give two salient features or any unique feature, each of the following division or phylum: 

A. Division Thallophyta.

B. Division Pteridophyta.

C. Division Gymnosperms.

D. Phylum Coelenterata. 

E. Phylum Annelida. 

F. Phylum Arthropoda. 

G. Phylum Protochordata. 

H. Phylum Vertebrata.

Answer 1

(A). Division Thallophyta 

• The plant body is thalloid are not divided into true root, stem or leaves  
• Conducting elements are absent in thallophytes 

(B) Division Pteridophyta 

• Pteridophyta are first true land plants 
• They are seedless, vascular cryptogams 

(C) Division gymnosperms 

• They have naked seeds, that is, its seeds are not covered by fruit. Formation of the flower is absent. 
• The seeds are pollinated by wind 

(D) Phylum Coelenterata 

• Presence of cnidoblast cells, therefore, phylum also known as cnidaria 
• All the members of phylum Coelenterata are aquatic, mostly marine. 

(E) phylum Annelida 

• Body is metamerically segmented 
• First Phylum having a true coelom 

(F) phylum Arthropoda  

• Animals having jointed appendages 
• Largest and most successful phylum on the Earth 

(G) subphylum protochordate 

• Pharynx perforated by Gill slits. 
• A post-anal tail is present. Brainbox is absent.

(H) subphylum Vertebrata 

• The notochord is replaced by a cartilaginous or bony vertebral column in the adult 
• Presence of dorsal hollow nerve cord