What is a bacteriophage?

The viruses that infect bacteria,multiply within them,and cause their lysis are called .........

Select the correct statement.

Which one of the following statements is correct?

What is the function of the algal component in a lichen?

Asexual reproduction in lichens occurs through which of the following? $(i)$ Pycniospores $(ii)$ Zoospores $(iii)$ Aplanospores $(iv)$ Soredia $(v)$ Apothecia