Pollen is a powder that can range in consistency from fine to coarse and contains the microgametophytes of seed plants. These microgametophytes are responsible for the production of male gametes. The anther, which is the male reproductive portion of the flower, contains pollen grains in its structure. Therefore, the right response is choice (C), which is ‘Another.’
D) Brassica. Compound pollen are pollen grains that consist of four tetrad pollen grains joined together in such a way that they cannot be separated. Compound pollen are found in more than 56 families of angiosperms. Compound pollen grains will be produced if microspores are not first detached from their tetrads and then transformed into individual pollen grains.
What are pollen grains?
What exactly are these grains of pollen?Pollen grains are tiny structures that bear androecium, which is the male reproductive organ of a flower.Pollen grains are found in flowers.The cytoplasm may be found in the central portion of the pollen grain, along with the tube cell, which transforms into a pollen tube, and the generative cell, which is responsible for releasing the sperm nuclei.
What is the source of pollen in plants?
Pollen can be formed in the microsporangia of the male cone of a conifer or other gymnosperm, or it can be produced in the anthers of a flowering angiosperm. Pollen grains can take on a broad range of forms, sizes, and surface patterns that are distinctive to the species to which they belong (see electron micrograph, right).
What type of plants have pollen grains?
The pollen grains of almost all angiosperm and gymnosperm plant families, as well as many genera, may be used on their own to identify the species. Palynology is the scientific name for the study of pollen and spores.
Where are pollen grains found in?
The stamen is the component of blooming plants that is male. This structure is known as an anther and it is held up by a single stalk known as the filament. The four pollen sacs that are typically seen in the anther are what are responsible for the production of pollen grains. A single cell containing two male gametes is contained within each pollen grain.
Which type of pollen grains are found in Drosera?
Drosera grains can be found here. Numerous holes are dispersed throughout the surface of the pollen of species belonging to the genus DrosoplyNnm, which has pollen that is arranged in tetrads. The pores in the pollen of the Dionea plant are spherical, and although they are located in the equatorial region, they extend into the proximal hemisphere.
What is Pollinium example?
Pollinium is a collection of pollen grains that have become cohesive and is generated by plants that resemble orchids. Pollination is essentially assisted by the insects known as pollinia. example – the blooms of calotropis have pollinia in their structures.
Do both angiosperms and gymnosperms have pollen?
In the process of sexual reproduction, pollen is produced by all types of plants, including gymnosperms (plants that bear cones) and angiosperms (flowering plants).In gymnosperms, the microsporangiate cones, also known as male cones or pollen cones, are responsible for the production of pollen.In angiosperms, on the other hand, pollen is formed in the anthers (part of the stamen within the flower).
Is pollen found in all plants?
What precisely is pollen? Flowering plants, also known as angiosperms, and coniferous plants, also known as gymnosperms, are the only types of plants that generate pollen. Pollen is a very minute grain that is made up of only a few cells. In the spring, pollen can make it difficult to breathe for people who suffer from allergies.
What is the example of pollen grain?
Rose pollen grain and hibiscus pollen grain are two types of examples that may be used to illustrate pollen grains. This is pollen collected from flowers. Pollen grains from cycads, which are non-flowering plants, are another possible source of these grains.
Which type of plant is Drosera?
At least 194 different species belong to the carnivorous plant genus Drosera, which is one of the largest and most diverse of all plant families in this category. These plants of the Droseraceae family have stalked mucilaginous glands that cover the surfaces of their leaf blades. These glands are used to attract insects, trap them, and digest them.
What do you mean by pitcher plant?
A plant (particularly a member of the family Sarraceniaceae, often known as the pitcher-plant family) having leaves that are shaped like pitchers and are capable of trapping and digesting insects by the use of a fluid that is generated by the leaves is called a pitcher plant.
Where is sundew plant found?
Sundews may be found in both tropical and temperate locations, but are particularly prevalent in Australia. They thrive in sandy, acidic soil and can be found in bogs and fens.
Which of the following plant pollinium is seen hibiscus?
Therefore, ″Calotropis″ is the appropriate response.
Which of the following plant shows pollinium structure?
Therefore, the proper response is the ″Asclepiadaceae″ choice.
Do all orchids have Pollinaria?
Only two of the five subfamilies of Orchidaceae, the Epidendroideae and the Orchidoideae, contain authentic pollinia and pollinarium (Singer et al. 2008). These two subfamilies are also the richest in terms of the number of species and genera, and significant contributions have been made to their respective phylogenies (for example, Inda et al.). Among the five subfamilies of Orchi