STD 11 - 8. Cell the unit of life — BIOLOGY STD 11 Science — Question

$(i)$ It is a contractile tissue present only in the heart.

$(ii)$ Cell junctions fuse the plasma membranes of these cells and make them stick together.

$(iii)$ Communication juntions at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract.

Which of the following type of tissue is being described by the above statements?

$1.$ Unicellular and prokaryote

$2.$ Unicellular and eukaryote

$3.$ Multicellular and eukaryote

$4.$ Autotrotroph and heterotroph

$\begin{array}{|p{0.6\linewidth}|p{0.3\linewidth}|} \hline Column\,\,-I  & Column\,\,-II \\ \hline (p)\,\,Grana\,\,region\,\,of\,\,chloroplast & (i)\,\,Krab's\,\,cycle \\ \hline (q)\,\,Stroma\,\,region\,\,of\,\,chloroplast & (ii)\,\,Light\,\,reaction \\ \hline (r)\,\,Cytoplasm  & (iii)\,\,Dark\,\,reaction \\ \hline (s)\,\,Cytoplasm\,\,of\,\,mitochondria & (iv)\,\,Glycolysis \\ \hline \end{array}$