The phenomenon of a single gene affecting multiple traits is called: MCQ with Answer and Explanation

Explanation:
Platelets adhere to damaged vessel walls, aggregate, and release clotting factors, forming a plug and initiating the coagulation cascade. RBCs carry oxygen, WBCs fight infection, lymphocytes are immune cells.

Explanation:
Plasmodesmata are microscopic channels that traverse the cell walls of plant cells, enabling the transport of water, ions, molecules, and even some viruses between them, thus ensuring cytoplasmic continuity. Gap junctions perform a similar function in animal cells, while tight junctions and desmosomes are for sealing and adhesion, respectively.

Explanation:
All three are correct chemical names: B₁ thiamine, B₂ riboflavin, B₆ pyridoxine.