Скачать или смотреть Study of specimens and identification with reason biology practical class 11 experiment 1 b answers

Study of specimens and identification with reason biology practical class 11 experiment 1 b answers

Class 11
Biology practical
Part -B
2. Study of specimens and their identification.
Answers
By: solutions made easy
phylum: porifera.


E.g sycon
(1) Sycon is a marine sponge found attached to rocks.
(2) It occurs as a colonial sponge with several cylindrical hollow branches.
(3) The body is vase - like with an opening called osculum at the free end. Around the osculum
there is an oscular fringe of spicules.
(4) The body is porous and the pores are called dermal ostia which lead into a system of canals
in the body wall. These pass into the internal cavity called spongocoel.
(5) The skeleton of the body is made up of calcareous needle like structures called spicules.
(6) Sycon is hermaphrodite and reproduces by asexual and sexual methods.

Find out 2 more examples of this phylum.
spongilla ,Euplectella, bathsponge.

biology practical class 11 study of specimens and identification with reasons

study of specimens and identification with reasons
class 11 biology practical part b experiment 1 answers
class 11 biology practical experiment 1 part b

study of specimens and identification with reasons class 11
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