To identify the defining feature of a herb, we need to recall the basic characteristics used to classify different types of plants (herbs, shrubs, trees, climbers, creepers) based on their stem structure and overall growth habit.
Correct Option: A) Always green and tender stem
The question asks about the primary objective behind the development of Bt-brinjal, a genetically engineered form of brinjal. Understanding the purpose of 'Bt' technology in crops is key to answering this question.
Correct Option: A) To make it pest-resistant. The primary goal of developing Bt-brinjal is to introduce resistance against specific insect pests, such as the brinjal fruit and shoot borer, which significantly reduces crop yield and quality.
The question asks about the various applications and prospects for which genetically engineered plants have been developed, beyond just pest resistance. We need to evaluate each given statement to determine its validity in the context of genetic engineering in plants.
Statements 1, 2, and 4 are valid applications or prospects of genetic engineering in plants. Statement 3, while related to space agriculture, misrepresents the specific role of genetic engineering in enabling photosynthesis in space; photosynthesis is a fundamental plant process, and engineering efforts for space are more about adapting plants to the unique environmental constraints of space, not enabling the process itself.
The question asks to identify a plant type that grows on another plant but does not derive nourishment from it. This describes a specific ecological relationship where one plant uses another for physical support without being parasitic. We need to evaluate each option based on its definition.
C) Epiphyte — Epiphytes, such as many orchids and bromeliads, grow on other plants for physical support and access to sunlight, but they obtain their water and nutrients from the atmosphere (rain, fog, dust) and decaying organic matter, not from the host plant. They are not parasitic.
The question asks about the importance of 'sea buckthorn' based on several statements. We need to evaluate each statement for its correctness regarding the properties and uses of sea buckthorn.
C) 1 and 3 only. Statements 1 and 3 accurately describe the importance of sea buckthorn, highlighting its role in soil conservation and its nutritional value and adaptability to cold, high-altitude regions.
| Region | Well-known for the production of |
| 1) Kinnaur | Areca nut |
| 2) Mewat | Mango |
| 3) Coromandel | Soya bean |
The question asks to identify the correctly matched pairs between a region and a product it is well-known for. We need to evaluate each pair individually based on general geographical and agricultural knowledge.
D) None
As established in the step-by-step analysis, all three pairs are incorrectly matched. Kinnaur is known for apples, not areca nut. Mewat is not a prominent mango-growing region. The Coromandel Coast is not known for soya bean production.