Which of the following developed for the first time in Annelids?
(1) Cephalization
(2) Development of a true coelom
(3) Metameric segmentation
(4) Both 2 and 3
Concept Questions :-
Difficulty Level:
Consider the following characters:
I. Air bladder
II. Operculum
III. Viviparity
The characters present in bony fishes include:
(1) I, II and III
(2) I and III only
(3) I and II only
(4) II and III only
Concept Questions :-
Difficulty Level:
Homeothermy is exhibited by:
(1) All amniotes
(2) Birds and Mammals
(3) All dueterostomes
(4) Reptiles and Mammals
Difficulty Level:
Consider the following characteristics of Porifers:
I. Collared cells called as choanocytes
II. Canal system with pores (ostia) in body wall
III. Mineral spicules
IV. High cellular mobility and totipotency
Which of these can be regarded as synapomorphies of Porifera?
Concept Questions :-
Difficulty Level:
Identify the incorrect statement:
(1) Medusa of Scyphozoans are called as jelly fishes.
(2) Ctenophores are the largest animals that move with the help of cilia.
(3) Flat worms that have a digestive cavity, have an incomplete gut.
(4) Nematodes are covered with thick cuticle that does not moult.
Concept Questions :-
Difficulty Level:
Match Nematode with their common names and choose answer from codes given below:
|
|
Nematode |
|
Common names |
|
I. |
Ancylostoma duodenale |
1. |
Pin worm |
|
II. |
Enterobius vermicularis |
2. |
Filaria worm |
|
III. |
Trichuris trichiura |
3. |
Loa loa |
|
IV. |
Dracunculus medinensis |
4. |
Whip worm |
|
V. |
Onchocerca volvulus |
5. |
Hook worm |
|
VI. |
Wuchereria bancrofti |
6. |
Guinea worm |
Codes:
|
|
I. |
II. |
III. |
IV. |
V. |
VI. |
|
(1) |
5 |
1 |
4 |
6 |
3 |
2 |
|
(2) |
5 |
4 |
3 |
6 |
1 |
2 |
|
(3) |
5 |
3 |
4 |
1 |
6 |
2 |
|
(4) |
5 |
6 |
4 |
3 |
1 |
2 |
Concept Questions :-
Difficulty Level:
What is the most important reason for the immense success of arthropods?
(1) Chitinous exoskeleton
(2) Uricotelic nature
(3) Compound eye
(4) Multipurpose appendages
Concept Questions :-
Difficulty Level:
What is not true for a generalized mollusc?
(1) Body segmented into head, visceral mass and foot.
(2) A rasping tongue like organ – radula present.
(3) Mantle cavity with gills
(4) Excretory structures – nephridia
Concept Questions :-
Difficulty Level:
How many of the characters given below are true for echinoderms?
I. An endoskeleton of calcareous ossicles
II. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical.
III. They are triploblastic and coelomate animals.
IV. Digestive system is complete.
V. Water vascular system
VI. Sexual reproduction, internal fertilization and direct development.
(1) 3
(2) 4
(3) 5
(4) 6
Concept Questions :-
Difficulty Level:
Which of the following is not seen in hemichordates?
(1) A tripartite body organization
(2) Stomochord
(3) Rudimentary notochord
(4) Proboscis gland
Concept Questions :-
Difficulty Level:
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