| 1 |
In urochordates the notochord is present |
In adult stage
Only in larval stage
Throughout life
Lack in all stages
|
| 2 |
The tubular nere cord in chordates is present. |
Lateral walls of pharynx
Dorsal to notochord
Near the throat
Ventral to reproductive system
|
| 3 |
Which of the followign is a common derived characteristic of all chordates at some stage of their life cycle. |
Post anal tail
Amniotic egg
Vertebral column
Radial symmetry
|
| 4 |
The unique and distinguishing characteristics of arthropods is. |
Closed type of circulartoy system
Flame cells
Joined appendages
Radical symmetry
|
| 5 |
The exoskeleton of arthropods is primarily composed by |
Silica
Calcium carbonate
Celluose
Chitin
|
| 6 |
The process of shedding old exoskeleton and formaing new exoskeleton of large size in arthropods is termed as. |
Metamorphosis
Ecodysis
Regenerration
Reproduction
|
| 7 |
The exretory structures in arthropods is |
Crop
Gizzard
Malpighian tubules
Mesenteron
|
| 8 |
Which one of the following arthropod respires through tracheal tubes. |
Prawn
Crab
Spider
Lobster
|
| 9 |
The water vasular system in echinoderms is basically used for. |
Excretion
Locomotion
Respiration
Reproduction
|
| 10 |
The adults of Echinodermata exhibit ......................symetry. |
Radial
Bilalteral
Spherical
Botha a and b
|
| 11 |
the madreportie in echinoderms is the part of ........................system. |
Excretory
Water vascular system
Nervous
Reproductive
|
| 12 |
Which of the following is not a characteristics feature of echinoderms. |
Deuterostome developement
Open circulatory system
Tube feet
Calcareous endoskeleton
|
| 13 |
Which of the followign echinoderm is known for its ability to regenerte its lost cut arms. |
Brittle star
Sea cucumber
Cake urchin
Sea urchin
|
| 14 |
Radula or resping tongue in molluses is primarily used for |
Feeding
Locomotion
Filtering
Excretion
|
| 15 |
Excretion in molluses is carried out by |
Malpighian tubules
Protonephridia
Nephridia
Flame cells
|
| 16 |
Squids and octopuses belong to which class of mollucs |
Cephalopoda
Gastropoda
Brivalvia
Polychaetaea
|
| 17 |
The mantle in molluses secrrete the following structure. |
Gills
Foot
Shell
Radula
|
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