Plant Biology

Step 1: Understanding the Concept:
The question asks to identify the most abundant polysaccharide that forms the structural component of a plant cell wall.

Step 2: Detailed Explanation:
Let's analyze the options:
Therefore, cellulose is the polysaccharide found in abundance in plant cell walls.

Step 3: Final Answer:
The cell wall in plant cells has an abundance of Cellulose.

Step 1: Understanding the Concept:
The question asks to identify the characteristics that contribute to the efficiency of honey bees as pollinators.

Step 2: Detailed Explanation:
Let's evaluate each character:
The correct statements that describe why honey bees are efficient pollinators are (B), (C), and (D).

Step 3: Final Answer:
The correct combination of characters is (B), (C), and (D).

Concept: Improved fruit varieties are developed for traits like dwarfness, early bearing, and suitability for high-density planting.
Step 1: Understanding "Pusa Nanha".
Pusa Nanha is a well-known dwarf variety developed for compact growth.
Step 2: Identifying the crop.
It is a variety of papaya characterized by short stature and early fruiting.
Step 3: Key features.

• Dwarf and compact plant
• Suitable for kitchen gardens and pot culture
• Early bearing

Step 4: Evaluating the options.

• Papaya Correct
• Mango Not correct
• Banana Not correct
• Guava Not correct

Step 5: Additional insight.
Being dioecious, papaya plants have separate male and female plants, which is important for pollination and fruit production.
Step 6: Conclusion.
Thus, Pusa Nanha is a dwarf variety of papaya.