Sexual reproduction in Spirogyra is called

Explanation

Spirogyra is a type of green algae that reproduces sexually through a process called conjugation. This means that two individual Spirogyra cells come together and exchange genetic material to form zygotes. The zygotes then develop into new Spirogyra cells. The other options listed in the question are not correct. Fertilization is a similar process to conjugation, but it involves the fusion of gametes from two different individuals to form a zygote. Symbiosis and mutualism refer to types of relationships between different organisms, while reproduction is a general term that can refer to any process by which an organism produces offspring. It is important to understand the process of sexual reproduction in Spirogyra because it is an example of how different organisms can reproduce in different ways. This knowledge can help us understand the diversity of life on Earth.