MCQ
The two families dominate in having maximum useful plants [
- ✓Fabaceae and Poaceae
- BLiliaceae and Solanaceae
- CMalvaceae and Brassicaceae
- DLiliaceae and Poaceae
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$(i)$ Unicellular, colonial, filamentous, symbiotic or free living.
$(ii)$ The colonies are surrounded by a gelatinous sheath.
$(iii)$ Some can fix atmospheric nitrogen in specialized cells called heterocysts.
$(iv)$ They often form blooms in water bodies.
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Column $I$
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Column $II$
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| $A$ |
Touch
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$i.$ |
Nasal epithelium
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| $B$ |
Smell
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$ii.$ |
Foramen magnum
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| $C$ |
Cranial nerves
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$iii.$ |
Sensory papillae
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| $D$ |
Medulla oblongata
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$iv.$ |
Peripheral nevous system
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$I.$ The medulla is connected to the spinal cord.
$II.$ Medulla contains controlling centers for respiration, cardiovascular reflexes and gastric secretion.
$III.$ Cerebellum has very convoluted surface in order to provide the additional space for more neurons.