A flower is a modified shoot, which is an important organ of sexual reproduction of angiosperms. The flowers are very diverse. They have a specific smell, shape, color and size, but their structure has the same structure: perianth, peduncle, stamens and pistil. To find out what a corolla and a cup are, you need to consider the structure of the perianth.
Perianth species
Each perianth consists of two main parts: the corolla and calyx. If both of these components are present in the perianth at the same time, then it is called double. If there is only one thing - simple.
There are flowers in which perianth is completely absent. In this case, they are called naked, or bloodless.
What is a whisk
Many concepts, as you know, can have several meanings. In our case, the word "whisk" is ambiguous, and it is important to understand that this is not about kitchen utensils or machine parts. We are interested in the question of what is a whisk in biology.
So, the rim is called the inner part of the perianth (double), consisting of brightly colored petals. It can develop from vegetative leaves, but most often they are stamens (generative organ). The corolla is the most prominent part of the flower, which differs from the calyx in a variety of shapes, colors and larger sizes. It is he who plays the role of "bait", attracting bees with its spots and lines, folding in beautiful patterns. Insects see these patterns in ultraviolet light, and the different color of the petals serves as a specific indicator of the presence of nectar for them. However, it also happens that the corolla of the flower develops weakly or even undergoes reduction. This happens in wind-pollinated angiosperms, since they do not need to attract the desired pollinators.
Another important function of the corolla is the reflection of some part of the sun's rays and the closing of the petals, which contributes to the protection of the generative organs of the flower (pistils and stamens) from overheating during the day and cooling at night.
What is a cup
A calyx is a vegetative organ of a flower, consisting of a different number of sepals, often green in color and capable of photosynthesis. The formation of organic matter from inorganic is not the main function of this part of the flower. A cup protects the bud of a plant that has not yet opened.
Thus, even an ordinary flower has a rather complicated structure, which helps it adapt to many environmental conditions. A flower is one of the units of the flora, small, but as perfect as everything else, created by Mother Nature.