Which plant tissue transports organic solutes from leaves to other parts? MCQ with Answer and Explanation

Explanation:
The natural greenhouse effect keeps Earth warm enough for life; its enhancement causes global warming. Statement 3 is incorrect. 1 and 2 are correct.

Explanation:
Phosphorus is part of the phosphate backbone of DNA/RNA and the high-energy bonds of ATP. Nitrogen is in bases and amino acids, iron in hemoglobin, sulfur in some amino acids. Phosphorus is essential for energy transfer and genetic material.

Explanation:
Vitamin A (retinol) is crucial for maintaining healthy vision, particularly in dim light, as it is a component of the visual pigment rhodopsin. The B-complex vitamins (like B1, B2, B3, B5) act as coenzymes and are essential for various metabolic pathways, particularly the conversion of carbohydrates, fats, and proteins into usable energy. Vitamin K, not Vitamin C, is essential for the synthesis of blood clotting factors; Vitamin C is essential for collagen synthesis and immunity. Thus, statements 1 and 2 are correct.