Plant Reproduction and Germination

Hydrophytes are plants adapted to grow in water or very moist environments. Examples include water lilies, lotus, and hyacinths. They have specialized adaptations like reduced root systems and air-filled tissues to float.

The coco de mer (Lodoicea maldivica), also known as the giant fan palm, produces the largest seed in the world - weighing up to 25 kg. It is endemic to the Seychelles islands.

A corm is an underground stem modification that exhibits dormancy, allowing plants to survive unfavorable conditions. Examples include taro and crocus. Beetroot, carrot, and potato are other root/tuber modifications but the question specifically asks which shows dormancy as a characteristic feature.

Fruits are the seed-dispersal structures of flowering plants. They protect seeds and facilitate their spread through various mechanisms like wind, water, or animal consumption. Roots (B) anchor plants, leaves (C) conduct photosynthesis, and branches (D) support leaves - none primarily function for seed dispersal.

Strawberries are unique because their seeds (achenes) are on the outside. What we commonly call 'seeds' are actually the tiny fruits, while the fleshy part is the receptacle. This makes strawberries the only fruit with seeds on the outside. The correct answer is True.

Mustard is a plant where the seed is the primary part used/referenced in this context. A carrot is a taproot, meaning the edible part of the plant is the root. It is not a fruit, stem, or flower.

Apples have 5 seed pockets (carpels) arranged in a star pattern when cut horizontally. Each pocket typically contains 1-2 seeds, though not all may develop seeds in every apple.

The calculation shows 1.25 million seeds would weigh approximately 1.56 grams (1.25M/800,000), not 1 gram. While orchid seeds are indeed among the smallest (requiring ~800,000 seeds per gram), the specific number 1.25 million is mathematically incorrect.

Coffee plants take 3-5 years from planting to produce their first harvestable beans, but the fruit (coffee cherries) becomes consumable earlier. The statement says it takes five years to yield consumable fruit, which is not accurate - coffee plants typically bear fruit in 3-4 years.

In grain crops like wheat and rice, nitrogen supply during grain filling comes primarily from the remobilization of nitrogen stored in older leaves, which senesce and transfer their nutrients to developing grains. Roots absorb nitrogen from soil but don't directly supply it to grains, while the stem (Option C) mainly transports nutrients and photosynthesis (Option D) produces carbohydrates, not nitrogen.

Composite seeds, hybrid seeds, and breeder seeds are legitimate agricultural seed categories developed through controlled breeding. 'Mutant seed' is not a standard seed variety category - mutation is a breeding technique, not a seed classification.

Respiration tests, embryo culture methods, and seed dormancy studies are all valid techniques for assessing seed viability and life. Indigocarmine is a dye stain used in cytology, not a method for determining seed life.

Sunflower heads are composite flowers consisting of two types of florets: ray florets (the outer petal-like structures) and disc florets (the small flowers tightly packed in the center). The disc florets are arranged in a spiral pattern and are responsible for seed production, maturing into achenes (the seeds we eat). Ray florets are sterile and only serve to attract pollinators.