Academic session 2026-27, Chapter 4 in the current curriculum.
Welcome to the NCERT Solutions for Class 11 Biology - Chapter Animal Kingdom. This page offers a step-by-step solution to the specific question from Exercise 0, Question 8:
Differentiate between:
a. Open and closed circulatory system
b. Oviparity and viviparity
c. Direct and indirect development
d. Aceolomate and pseudocoelomate
e. Notochord and nerve cord
f. Polyp and medusa
Differentiate between:
a. Open and closed circulatory system
b. Oviparity and viviparity
c. Direct and indirect development
d. Aceolomate and pseudocoelomate
e. Notochord and nerve cord
f. Polyp and medusa
a. Open circulatory system: Blood is directly circulated in the cells and tissues without any network of vessels. Example: Mollusca, Arthropoda.
Closed circulatory system: Blood is circulated through a proper network of vessels (arteries, veins and capillaries). Example: Annelida and Chordata.
b. Oviparous: Oviparous are the animals that lay eggs. Oviparous animals or organisms look after their eggs after laying them.
Example: Birds, Reptilia.
Viviparous: are those animals that gives birth to the live young ones. They show parental care after their birth.
Example: Mammals.
c. Direct development: In this development larval stage is not present. An embryo develops into a mature individual without involving larval stage. Example: Human beings.
Indirect development: In this development sexually immature larval stage is present. Example: Butterflies.
d. Acoelomate: The animals in which the body cavity is absent. Example: Poriferans, Ctenophores.
Pseudocoelomate: The animals in which the body cavity is not lined by mesoderm layer and mesoderm is present in scattered pouches in between ectoderm and endoderm. Example: Aschelminthes.
e. Notochord: It is mesodermally derived rod- like structure formed on the dorsal side during embryonic development.
Nerve cord: Nerve cord is a strand of nervous system.
f. Polyp: Poly is sessile and cylindrical form. Example: Hydra, Adamsia.
Medusa: Medusa is free swimming and an umbrella shaped structure. Example: jelly fish.
NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:
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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 8: Differentiate between: a. Open and closed circulatory system b. Oviparity and viviparity c. Direc....
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