When we look at the flowering plants around us, we notice that the flowers of these plants vary greatly in their appearance, structure, and arrangement on the branches. The mode of arrangement of flowers on the axis is termed an inflorescence. The pattern in which the flowers develop serves as the basis for the Classification […]
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Biology, Class 11, NEET, Photoperiodism and vernalisation, Plant PhysiologyThe vast majority of rose species are native to Asia, with a few exceptions from North America, Europe, and northwest Africa. Roses from around the world often hybridise, resulting in varieties that overlap the parental forms and make distinguishing between fundamental species difficult. Fewer than ten species, largely from Asia, mated and eventually produced many
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Biology, Class 11, NEET, Photoperiodism and vernalisation, Plant PhysiologyA phylogenetic trend between two forms of gynoecia within Apiales may be of interest. In spite of the lack of morphological limitations (Weberling 1989; Erbar and Leins 1996, 2004; Leins and Erbar 2004), it is uncertain if the state found in Pittosporaceae is ancestral within Apiales. Stevens (2009) proposes that Pittosporaceae floral form is derived
We consider flowers the eye-catching, attractive, bright and fragrant structures of plants. But if we look at it from a biological perspective, flowers are the major reproductive part of plants. Not only reproductive, but it is also a source of food for other organisms. Complete or incomplete flowers A complete flower comprises stamen (male), pistil
Anatomy of a flower Read More »
Biology, Class 11, NEET, Photoperiodism and vernalisation, Plant PhysiologyAmensalism is a sort of biological interaction between two organisms or species in which one is neither helped nor harmed, and the other is destroyed or inhibited. It’s a (0,-) interaction type. ‘0’ denotes no effect, whereas ‘-‘ denotes a negative effect. In general, it isn’t seen as a significant interaction because it is unintentional
All terrestrial plants are thought to have descended from a single-celled green algal progenitor. Water was extremely important to the progenitors of early plants, not just for maintaining moisture levels but also for structural support. The surrounding medium in a terrestrial setting is air rather than water. The absence of air provides no support for
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Biology, Class 11, NEET, Plant growth regulators: Auxins, gibberellins, cytokinins, Plant PhysiologyIntroduction Growth is defined as a vital process that brings about an endless and unrecoverable change in any plant or its part in respect to its size, form, weight, and volume. Growth is confined only to living cells and is fulfilled by metabolic processes. The plant growth rate depends on numerous factors. Cells don’t increase
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Biology, Class 11, NEET, Plant growth regulators: Auxins, gibberellins, cytokinins, Plant PhysiologyPlant Cell Definition The plant cell is the elementary component of every plant. Plant cells, for example, animal cells, stand eukaryotic, which means that they comprise organelles as well as membrane-bound nuclei. Dissimilar creatures cells and flora cells do comprise a wall of cells neighbouring the cell skin. Although frequently supposed as a sedentary product helping mainly mechanical as well as
Introduction The plant embryo, also known as the seed embryo, is the component of a seed or bud that contains the plant’s roots, stem, and leaves in their earliest forms. After a fertilised adult plant flowers, the embryo develops and is usually encapsulated within a seed or bud. Plant Embryo Development When a plant is
Plants, on the whole, continue to develop throughout their lives. Plants, like other multicellular animals, grow through cell division and growth. Cell division (mitosis) multiplies the number of cells, whereas cell expansion expands the size of the cells. Plant cells specialise in several cell types as they grow through cellular differentiation. Once cells have differentiated,
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Biology, Class 11, NEET, Plant growth regulators: Auxins, gibberellins, cytokinins, Plant Physiology