The cat was named the Olympic Games.

(1) A complete ecosystem consists of biological parts and abiotic parts, and the biological part consists of producers (plants), consumers (animals) and decomposers (bacteria and fungi). Bamboo belongs to producers and giant pandas belong to consumers.

(2) The giant panda in the picture is a fusion cell formed by the combination of donor cells and recipient cells (enucleation). The fusion cell divides and differentiates to form an embryonic cell, and then the embryo is transplanted. Therefore, the biotechnology used by scientists to cultivate giant pandas is cloning technology.

In this process, A is the nuclear donor and B is the cell membrane and cytoplasm. Cell division and differentiation need carbohydrates, protein, fats, vitamins and other organic substances.

(3)A donates the nucleus, B donates the cell membrane and cytoplasm, and there is genetic material in the nucleus, so the sex of the newborn panda D is male.

Therefore, the answer I: (1) consumers;

(2) A; b； Sugar; Protein; Fat; Vitamin;

(3) male; Nucleus;