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$(i)$ They are named because of their special function of linking and supporting other tissues/organs of the body.
$(ii)$ They include cartilage, bone, adipose and blood.
$(iii)$ They provide strength, elasticity and flexibility to the tissue.
$(iv)$ They also secrete modified polysaccharides, which accumulate between cells and fibres and act as matrix.
$(1)$ $Z$ shape is formed when all the carriers are placed in a sequence on a redox potential scale.
$(2)$ The $4e^-$ released are accepted by various electron acceptors and finally enter into $PS-II$ instead of returning to $PS-I.$
$(3)$ In this process both $PS-I$ and $PS-II$ take part
$(4)$ As the electrons released in various ways do not return to their original donors, such an electron transport is called non-cyclic electron transport.
$I$.Coelomic cavity $II$. Level of organisation $III$. Notochord $IV$. Skeletal structure