A liverwort plant is unable to complete its life- cycle in a dry enviornment State two reasons .

Explanation

To answer the question about why a liverwort plant is unable to complete its life cycle in a dry environment, we can break it down into two main reasons:

1. **Dependence on Water for Reproduction**: Liverworts require water for sexual reproduction. The sperm produced by the male gametophyte must swim through a film of water to reach the egg in the female gametophyte. In a dry environment, this water is not available, making it impossible for the sperm to reach the egg and thus preventing fertilization and the continuation of the life cycle.

2. **Rudimentary Roots and Moisture Requirement**: Liverworts have rudimentary roots that are not well-developed for absorbing water from dry soil. They typically thrive in moist environments where they can absorb water directly through their surface tissues. In a dry environment, the lack of moisture means that liverworts cannot effectively take up the water they need for growth and metabolic processes, further hindering their life cycle.