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- Figure \(\PageIndex{1}\): Alternation of generations between the haploid (1n) gametophyte and diploid (2n) sporophyte is shown. (credit: modification of work by Peter Coxhead)
- Figure \(\PageIndex{2}\): This life cycle of a fern shows alternation of generations with a dominant sporophyte stage. (credit "fern": modification of work by Cory Zanker; credit "gametophyte": modification of work by "Vlmastra"/Wikimedia Commons)
- Figure \(\PageIndex{3}\): This life cycle of a moss shows alternation of generations with a dominant gametophyte stage. (credit: modification of work by Mariana Ruiz Villareal)
- Figure \(\PageIndex{4}\): This apple seedling is an example of a plant in which the apical meristem gives rise to new shoots and root growth.
- Division -Thallophytes
- Bryophytes
- Pteridophytes
- Gymnosperms
- Angiosperms
This includes algae, which don’t have a differentiated body (thalloid). They are autotrophic and contain chlorophyll. The algae reproduce by vegetative method (fragmentation), asexual (spores), and sexual (gametes) methods. Thallophytes are divided into the 3 classes- 1. Chlorophyceae– green algae store food as starch, cellulosic walls, chlorophyll...
They need water and soil to complete their life cycleand are known as amphibians of the plant kingdom. They may have root-like(rhizoids), leaf-like, or stem-like structures. The haploid plant body produces gametes (gametophytes). The male sex organ is called the antheridium, while the female is archegonium. When the antherozoids are released into w...
These are the first terrestrial plants to possess vascular tissues namely the xylem and phloem. These vascular tissues are well differentiated so that each cell can perform its required function. The spread of pteridophytes is limited as they require water for the transfer of the antherozoids (male gametes). Pteridophytes have true roots, stem and ...
In gymnosperms, the ovules are naked and are not enclosed within any ovary wall at any point in time. Gymnos stands for naked and sperms mean seeds. Gymnosperms usually have taproots. In some cases, these roots have fungal(mycorrhiza) association or have a symbiosis with nitrogen-fixing cyanobacteria(coralloid roots). Gymnosperms grow under extreme...
The ovules are present within seeds and seeds are not naked. The male sex organ stamen. consisting of a slender filament with an another bearing pollen grains. The female sex organ is the pistil consisting of an ovary at the base, a style, and stigma. The ovary contains ovules each having an embryo sac. Each embryo-sac has one egg cell and two syne...
The plant kingdom contains mostly photosynthetic organisms; a few parasitic forms have lost the ability to photosynthesize. The process of photosynthesis uses chlorophyll, which is located in organelles called chloroplasts. Plants possess cell walls containing cellulose.
The plant kingdom contains mostly photosynthetic organisms; a few parasitic forms have lost the ability to photosynthesize. The process of photosynthesis uses chlorophyll, which is located in organelles called chloroplasts. Plants possess cell walls containing cellulose.
Jan 21, 2020 · All members of the plant kingdom share common features. Plants: are made of more than one cell. We call them multicellular; have cell walls; mainly cannot move; make their own food; The plant kingdom can be divided into groups based on plant structures. Plants with similar structures are grouped together. In the plant kingdom, these groups are ...
Jul 25, 2017 · This process is known as photosynthesis. Only plants can make their food. All other living organisms are dependent on plants to derive food and energy. Plants provide us the oxygen we breathe by capturing carbon dioxide, thus acting as natural purifiers of the ecosystem.
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Sep 13, 2024 · Plant, any multicellular, eukaryotic, usually photosynthetic life-form in the kingdom Plantae. There are an estimated 390,900 different species of plants known to science. Learn more about the plant kingdom, including the life and evolutionary histories and physical characteristics of the major plant groups.
