Which of the following statements is correct ? (1) Fusion of two cells is called Karyogamy. (2) Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy. (3) Organisms that depend on living plants are called saprophytes. (4) Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
Option 2. Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy is the correct option.