1. Organization of stem apex into corpus and tunica is determined mainly by
(a) planes of cell division
(b) regions of meristematic activity
(c) rare of cell growth
(d) rate of shoot tip growth
2. Sieve tubes are suited for translocation of food because they possess
(a) bordered pits
(b) no ends walls
(c) broader lumen and perforated cross walls
(d) no protoplasm
3. Death of protoplasm is a pre-requisite for a vital function like
(a) transport of sap (b) transport of food
(c) absorption of water (d) gaseous exchange
4. Out of diffuse porous and ring porous woods, which is correct?
(a) Ring porous wood, carries move water for short period
(b) Diffuse porous wood carries more water
(c) Ring porous wood carries more water when need is higher
(d) Diffuse porous wood is less specialized but conducts water rapidly through out
5. What is true about all sponges without exception?
(a) They are all marine
(b) They have flagellated collar cells
(c) They have a mixed skeleton consisting of spicules and spongin fibres
(d) They reproduce only asexually by budding
6. Functionwise, just as there are nephridia in an earthworm, so are
(a) parotid glands in toad (b) statocysts in prawn
(c) flame cells in liver fluke (d) myotomes in fish
7. What is common among silver fish, scorpion, crab and honeybee?
(a) Compound eyes (b) Poison glands
(c) Jointed appendages (d) Metamorphosis
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