Name the two types of complex tissues.

Write two similarities between striated and cardiac muscles.

Name the animal tissue which acts as a heat insulator.

$A$ long tree has several branches. The tissue that helps in the sideways conduction of water in the branches is

$(a)$ Give reasons for the following:
$(i)$ Multicellular organisms are considered more efficient.
$(ii)$ Sclerenchyma cells have a narrow lumen.
$(iii)$ Epidermis is thicker in desert plants though it is usually single layered.
$(b)$ Name the following:
$(i)$ Tissue that occurs in specific regions of growth.
$(ii)$ Tissue present at the growing tips of stems and roots.
$(iii)$ Tissue at the base of the leaves or internodes on twigs.
$(iv)$ Basic packing tissue in the form of a few layers of cells.

State whether the following statement is true or false:
All epithelium is usually not separated from the underlying tissue by an extracellular fibrous basement membrane.