1. Unicellular animals have _____surface area to volume ratio
A. Maximum
B. Minimum
C. Less
D. Very less
2. Water and O2 is taken into ______ by movement of _____ and _______which are present in cells of endoderm
A. Enteron, tentacles, cillia
B. Respiratory cavity, cillia, tentacles
C. Enteron, tentacles, flagella
D. Enteron , flagella, tentacles
3. In hydra Ectodermal cells get food from ______ by _____
A. Endodermal cells, diffusion
B. Environment, diffusion
C. Endodermal cells, active transport
D. Environment, active transport
4. Planaria
A. Has no special transport system
B. Is acoelomate
C. Has flat body which provides greater surface area for materials exchange
D. All
5. Which of the following is characteristic/s of circulatory system
A. Circulatory fluid
B. Contractile pumping device
C. Tubes
D. All
6. Which of the following has open circulatory system
A. Snail
B. Squid
C. Octopus
D. All
7. Closed circulatory system is present in
A. Annelids
B. Echinoderms
C. Vertebrates
D. All
8. In earthworm _______pairs of lateral hearts are present on _____side of oesophagus in _______segments.
A. 4 or 5 , lateral, 7 to 13th
B. 7 or 8, lateral, 4 to 5th
C. 12 or 13 , dorsal, 12 to 13th
D. 1 or 2, dorsal, 5 to 6th
9. Closed circulatory system
A. Is regarded as primitive less effecient
B. Has Blood which directly bathes tissues
C. Also transports gases
D. All
10. Earth worm has main blood vessel/s
A. Dorsal
B. Ventral
C. Sub neural
D. All
11. In cockroaches haemolymph flows in/ around
A. Hoemocoel
B. Peri visceral sinus
C. Peri neural sinus
D. All
12. In cockroaches
A. No respiratory pigment is present
B. Blood is colorless
C. Gases are transported by tracheal system
D. All
13. Cockroach has ______ chambered heart and has pair of lateral openings called _______and ________ muscles present on sides of pericardial sinus helps in flow of blood.
A. 13, ostia , alary
B. 5, ostia, cilliary
C. 13, osculum, alary
D. 13, ostia, cilliary
14. In cockroach tubular______vessel extending in thoracic and head region is called aorta opens anteriorly in _________of head having______opening
A. Dorsal, haemocoel, funnel shaped
B. Ventral, pigmented blood, funnel shaped
C. Dorsal, haemocoel, bottle shaped
D. Ventral, haemocoel, funnel shaped
15. In cockroach
A. Ventral vessel is chief distributing vessel with backward flow
B. Subneural vessel is collecting vessel
C. Dorsal vessel collects blood from 14th segment backward
D. All are correct