The by-products of photosynthesis in violets are oxygen and water. During photosynthesis, violets use carbon dioxide and water to produce glucose and oxygen. The oxygen is released into the atmosphere as a by-product, while the glucose is used as a source of energy for the plant. The water is also released as a by-product of the photosynthesis process. **

Yes, there are coin-operated vending machines in Flensburg. These machines can be found in various locations such as train stations, shopping centers, and public buildings. They offer a variety of products including snacks, drinks, and even everyday essentials like toiletries and phone chargers. Customers can use coins to make purchases from these vending machines. **

African violets may droop their leaves and wilt due to a variety of reasons, including overwatering, underwatering, or exposure to extreme temperatures. Overwatering can lead to root rot, causing the leaves to droop and wilt. Underwatering can also cause the leaves to wilt as the plant becomes dehydrated. Additionally, exposure to extreme temperatures, such as cold drafts or direct sunlight, can cause stress to the plant and result in drooping and wilting leaves. It is important to carefully monitor the watering and environmental conditions of African violets to ensure they remain healthy and vibrant. **

The poem that begins with "Roses are red, violets are blue" is commonly known as a nursery rhyme or a simple love poem. It is often used as a template for creating personalized poems, with the first two lines setting the stage for the rest of the verse. This classic poem is a popular choice for expressing affection and is often used in Valentine's Day cards and romantic gestures. **

The horned violets are fertilized, as they require nutrients from the soil to grow and thrive. On the other hand, turtle food is not fertilized, as it is a processed food product specifically designed for the dietary needs of turtles, rather than being a plant that requires nutrients from the soil. **

At the first coin-operated vending machine, which was created in the early 1880s by Percival Everett, customers could purchase postcards for their money. The machine was installed in the railway stations and post offices in London, and for a penny, customers could receive a postcard featuring a picture of the surrounding area. This early vending machine was a novelty at the time and provided customers with a convenient way to purchase postcards without the need for human interaction. **

One funny saying that involves roses and violets is "Roses are red, violets are blue, I'm schizophrenic, and so am I." Another one is "Roses are red, violets are blue, I'm not good at rhyming, refrigerator." These sayings play on the traditional "roses are red, violets are blue" poem by adding unexpected and humorous twists. **

The answer to this question depends on individual preferences and needs. A cashier-operated checkout provides the opportunity for human interaction and personalized service, which some people may prefer. On the other hand, a self-service store offers convenience and efficiency, allowing customers to complete their purchases quickly and without waiting in line. Ultimately, the better option is subjective and varies from person to person. **