Plants

Zaid crops are grown in the short summer season between Rabi (winter) and Kharif (monsoon) seasons. Watermelon, muskmelon, cucumber, vegetables, and fodder crops are classic examples of Zaid crops grown from March to June.

Turmeric (Curcuma longa) is a perennial herb belonging to the zingiberaceae family.

Azadirachtin obtained from neem tree (Azadirachta) helps in treating fever and skin diseases. It also possesses anti-diabetic, anti-bacterial and anti-viral properties.

Robert Brown discovered the nucleus in 1831 while studying orchid cells, not in mangrove, bamboo, or onion cells. This was a fundamental discovery in cell biology, leading to the naming of the nucleus as the cell's control center. Orchid cells were particularly suitable for observation due to their large, prominent nuclei.

Rafflesia arnoldii produces the world's largest individual flower, which can grow up to 1 meter (3 feet) in diameter and weigh up to 11 kilograms. It's a parasitic plant native to Southeast Asian rainforests, particularly Borneo and Sumatra. The other options are much smaller - Nelumbo is a water lily, Hibiscus is a common flowering shrub, and cactus flowers are modest in size.

Jute is a vegetable fibre, which is obtained from the stem of a plant.

Panama disease (Fusarium wilt) is a serious fungal disease affecting banana plants, caused by the soil-borne fungus Fusarium oxysporum. It attacks the vascular system, blocking water transport and causing wilting and plant death. Rust affects wheat and other cereals, tikka is a groundnut disease, and neither are specific to bananas.

Acetabularia, a single-celled marine green alga, holds the record for being the largest unicellular organism, with some species reaching up to 5 centimeters in length. Despite being a single cell, it has a complex structure with a cap, stalk, and rhizoid. Funaria is a moss, Nostoc is a cyanobacterium forming colonies, and Colocasia (taro) is a multicellular plant.

Non-flowering plants are called gymnosperms.

Citrus canker is caused by bacteria.
Powdery mildew is caused by  fungi.

The Green Revolution (1940s-1970s) primarily focused on developing high-yield, disease-resistant wheat varieties, with Norman Borlaug's dwarf wheat being the cornerstone. While maize and other crops also saw improvements, wheat benefitted most dramatically, with production increasing by over 300% in some regions. Barley and cotton were not primary Green Revolution crops.

Phosphorus deficiency causes premature leaf fall because phosphorus is essential for energy transfer (ATP) and root development. When deficient, older leaves turn dark green or purplish, then yellow and fall off early as the plant mobilizes phosphorus from older tissues to new growth. Zinc, manganese, and boron deficiencies cause different symptoms like interveinal chlorosis, stunting, or cork formation.

Coriander and sagittaria show the phenomenon of heterophylly. This refers to different leaf forms on the same plant.

Transporting food is the function of phloem.

Hydroponics is the soilless cultivation of plants where roots grow in nutrient-rich water solutions or inert media like perlite or rockwool. The term comes from Greek 'hydro' (water) and 'ponos' (labor). It's not about aquatic plants in general (options A, B, D) but rather a controlled agricultural technique for growing terrestrial plants without soil.