The two functional groups characteristic of sugars are Options (a) Carbonyl and hydroxyl (b) Carbonyl and phosphate (c) Carbonyl and methyl (d) Hydroxyl and methyl Correct Answer: Carbonyl and hydroxyl Explanation: Sugar is a common […]
The transparent lens in the human eye is held in its place by Options (a) smooth muscles attached to the ciliary body (b) smooth muscles attached to the iris (c) ligaments attached to the iris […]
The stage during which separation of the paired homologous chromosomes begins is Options (a) Zygotene (b) Diakinesis (c) Diplotene (d) Pachytene Correct Answer: Diplotene Explanation: Synaptonemal complex disintegrates.Terminalisation begins at diplotene stage i.e chiasmata start […]
The similarity of bone structure in the forelimbs of many vertebrates is an example of Options (a) Adaptive radiation (b) Convergent evolution (c) Analogy (d) Homology Correct Answer: Homology Explanation: In different vertebrates, bones of […]
The Golgi complex participates in Options (a) Activation of amino acid (b) Respiration in bacteria (c) Formation of secretory vesicles (d) Fatty acid breakdown Correct Answer: Formation of secretory vesicles Explanation: Golgi complex, after processing […]
Sweet potato is a modified Options (a) Rhizome (b) Tap root (c) Adventitious root (d) Stem Correct Answer: Adventitious root Explanation: Sweet potato is a modified adventitious root for storage of food. Rhizomes are underground […]
Stomatal movement is not affected by Options (a) CO₂ concentration (b) O₂ concentration (c) Light (d) Temperature Correct Answer: O₂ concentration Explanation: Light, temperature and concentration of CO₂ affect opening and closing of stomata while […]
Stomata in grass leaf are Options (a) Barrel shaped (b) Rectangular (c) Kidney shaped (d) Dumb-bell shaped Correct Answer: Dumb-bell shaped Explanation: Grass being a monocot, has Dumb-bell shaped stomata in their leaves.
Pneumatophores occur in Options (a) Submerged hydrophytes (b) Carnivorous plants (c) Free-floating hydrophytes (d) Halophytes Correct Answer: Halophytes Explanation: Halophytes like mangrooves have pneumatophores.Apogeotropic (–vely geotropic) roots having lenticels called pneumathodes to uptake O2.
Plants having little or no secondary growth are Options (a) Cycads (b) Conifers (c) Deciduous angiosperms (d) Grasses Correct Answer: Grasses Explanation: Grasses are monocots and monocots usually do not have secondary growth.Palm like monocots […]
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