What kind of tissue is the forerunner of long bones in the embryo

Hyaline cartilage.

Explanation:

Tissue are ensemble of specialised cells that perform functions.

Cartilage is a smooth and translucent tissue.

Hyaline cartilage is a glass like, transluscent cartilage found in the surfaces of joints. It is pearl grey like in color. It is normally found at the end of long bones of ribs, larynx and trachea. It has a lot of collagen

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.