The flowering response in short-day plants and long-day plants is dependent on the durations for which these plants are exposed to light. The short-day plant and long-day plant can flower at the same place, provided they have been given an adequate photoperiod.
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell.
Describe the structure of the following with the help of labelled diagrams.
(i) Nucleus
(ii) Centrosome
How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?
Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.
Multicellular organisms have division of labour. Explain.
Cell is the basic unit of life. Discuss in brief.