4) Why is it important to control the presence ethylene gas when ripening fruit?

5) Describe two aspects of dams that depend on the proper flow
of fluids.

Please help me with these questions! thanks

4) It is important to control the presence of ethylene gas when ripening fruit because ethylene is a natural plant hormone that regulates fruit ripening. When ethylene is present in high concentrations, it can accelerate the ripening process and lead to faster deterioration of the fruit. On the other hand, in controlled environments, such as storage facilities or transport containers, reducing ethylene concentrations slows down the ripening process, extending the shelf life of the fruit.

To control the presence of ethylene gas, you can take the following steps:

1. Ethylene Absorbents: Use ethylene absorbent materials or sachets that are specifically designed to absorb ethylene gas. These sachets can be placed in containers, cold storage rooms, or refrigerators to reduce ethylene levels.

2. Ventilation: Ensure proper ventilation in storage areas or transport containers. This helps to remove or dilute the ethylene gas and maintain a suitable atmosphere for fruit preservation.

3. Temperature and Humidity Control: Regulate the temperature and humidity levels to slow down the release of ethylene gas. Lower temperatures and controlled humidity can help in delaying the ripening process and reduce ethylene production.

4. Separation of Fruit: Separate ripe or overripe fruits from unripe ones. Ripe fruits produce more ethylene gas, which can hasten the ripening of nearby fruits. Ensure proper segregation to prevent unwanted ripening.

5) Two aspects of dams that depend on the proper flow of fluids are:

1. Hydroelectric Power Generation: Dams are often constructed to block the flow of water, creating a reservoir or a large body of water behind the dam. The water is then released in a controlled manner through turbines, which drive generators to produce electricity. The proper flow of water is crucial to ensure the efficient generation of hydroelectric power. Any disruption in the flow, such as sediment buildup or improper water release, can impact the output and efficiency of the power generation system.

2. Irrigation: Dams are often used for storing water that can be released later to provide irrigation to agricultural fields or other areas. The controlled flow of water from the dam to the fields is essential for effective irrigation practices. Proper flow ensures that the water reaches the desired areas in the required amounts, preventing over or under-watering of crops. By managing the flow, dams can ensure a stable and reliable water supply for irrigation purposes.