CBSE
Consider following features
(a) Organ system level of organisation
(b) Bilateral symmetry
(c) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics
Annelida, Arthropoda and Mollusca
Arthropoda, Mollusca and Chordata
Annelida, Mollusca and Chordata
Annelida, Arthropoda and Chordata
From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in
Mosses
Pteridophytes
Gymnosperms
Liverworts
Match the following organisms with their respective characteristics :
A. Pila | i. Flame cells |
B. Bombyx | ii. Comb plates |
C. Pleurobrachia | iii. Radula |
D. Taenia | iv. Malpighian tubules |
Select the correct option from the following:
A - iii; B - iv; C - ii; D - i
A - ii; B - iv; C - iii; D - i
A - iii; B - ii; C - iv; D - i
A - iii; B - ii; C - i; D - iv
One of these is not a feature of non-chordates
Absence of post-anal tail
Ventrally located central nervous system
Absence of notochord
Ventrally located heart
Ventrally located heart
Find out the wrong statements
(A) Ulothrix and Spirogyra are filamentous forms
(B) Porphyra and Laminaria are fresh water algae
(C) Stored food is in the form of mannitol in Rhodophycean members
(D) Chlorella and Spirulina are unicellular algae
(A) and (B)
(B) and (C)
(A) and (C)
(A) and (D)
(A) and (D)
I. Unicellular Protists found in fresh water
II. Possess a protein-rich outer layer called pellicle
III. Have two flagella
IV. Possess pigments identical to those in higher plants.
These characters apply to genus
Alternaria
Nostoc
Chlorella
Euglena
Euglena
Match Column I with Column II and Column III. Choose the correct option
Column I | Column II | Column III |
1. Cnidocytes | A. Ctenoplana | i. Balancing |
2. Statocyst | B. Fasciola | ii. Defense |
3. Radula | C. Pennatula | iii. Feeding |
4. Flame cells | D. Locusta | iv. Locomotion |
5. Comb plates | E. Pila | v. Osmoregulation |
1-A-ii; 2-A-v; 3-E-iii; 4-C-i; 5-E-iv
1-B-iii; 2-A-iv; 3-E-v; 4-C-ii; 5-D-i
1-C-ii; 2-D-i; 3-E-iii; 4-B-v; 5-A-iv
1-D-i; 2-C-ii; 3-A-v; 4-B-iii; 5-A-v
1-D-i; 2-C-ii; 3-A-v; 4-B-iii; 5-A-v
Read the following statements and choose the correct option
(i) Aves are homoiothermous.
(ii) Pinnae are present in mammals.
(iii) Operculum is present in Chondrichthyes.
(iv) Skin of amphibians are dry and horny.
(v) Open type of circulation is found in cyclostomes.
(i) and (ii) only are wrong
(ii), (iii) and (iv) only are wrong
(i), (ii) and (iv) only are wrong
(iii), (iv) and (v) only are wrong
(iii), (iv) and (v) only are wrong
Identify the phylum from the statements given below
Cnidaria
Aschelminthes
Annelida
Arthropoda
Arthropoda
Organ | Phylum | Function |
Parapodia | Annelida | ? A |
? B | Ctenophora | Locomotion |
? C | Mollusca | Rasping organ |
Malpighian tubules | Arthropoda | ? B |
Cnidoblasts | Coelenterata | ? E |
A - swimming; B - comb plates; C - radula; D - excretion; E - defense
A - defense; B - radula; C - comb plates; D - excretion; E - swimming
A - defense; B - radula; C - comb plates; D - swimming; E - excretion
A - protection; B - parapodia; C - visceral mass; D - locomotion; E - excretion
A - protection; B - parapodia; C - visceral mass; D - locomotion; E - excretion