Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
365 views
in Biology by (50.2k points)

List out the characters of the phylum annelida. 

1 Answer

+1 vote
by (48.6k points)
selected by
 
Best answer

(i) Annelids are the first segmented animals to evolve. 

(ii) They are aquatic or terrestrial, free living but some are parasitic. 

(iii) They are triploblastic, bilaterally symmetrical, schizocoelomates 

(iv) Organization : organ system level organisation. 

(v) The coelom with coelomic fluid creates a hydrostatic skeleton and aids in locomotion. 

(vi) Body : metamerically segmented and the body surface is divided into segment or metameres. 

(vii) Internally the segments are divided from one another by partitions called septa. This phenomenon is known as metamerism. 

(viii) Nereis have lateral appendages called parapodia, which help in swimming. 

(ix) Circulatory system : closed type and the respiratory pigments are hemoglobin and chlorocruorin. 

(x) Nervous system : paired ganglion connected by the lateral nerves to the double ventral nerve cord. 

(xi) They reproduce sexually. 

(xii) Development is direct or indirect (Larva : trochophore ) eg. Lampito mauritii (Earth worm).

Related questions

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...