Complete the passage by writing a suitable word or words in each of the numbered spaces.

In commercial agriculture, tissue culture is widely used to clone elite crop varieties. To clone a disease-resistant banana cultivar, small sections of actively dividing tissue, termed (1) \text{__________}, are excised from the parent plant. To ensure a sterile environment and prevent the growth of contaminating (2) \text{__________}, the tissue surface and all dissection equipment must be thoroughly sterilised. The tissues are transferred to a semi-solid nutrient (3) \text{__________} containing essential growth factors. To support cellular respiration and metabolic activity in the tissue, a carbon source such as (4) \text{__________} is added. The medium also provides key inorganic ions: (5) \text{__________} ions are vital for the synthesis of amino acids and proteins, while (6) \text{__________} ions are critical for the formation of light-capturing chlorophyll pigments. Under the influence of specific plant growth regulators, the cells undergo rapid mitosis to form an unorganised, undifferentiated cell mass called a (7) \text{__________}. Because this cloning method relies entirely on asexual reproduction, the resulting plantlets are genetically (8) \text{__________} to the original parent plant.