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In this article we will discuss about the secretory structures in plants, explained with the help of suitable diagrams. The group of cells concerned in secretion of cutin, wax, suberin etc. is generally termed as secretory structures.
In the bud, Tetradenia riparia leaves have their upper surfaces turned toward the stem and the axil. The lower surface is abaxial ("away from the axis"), and the upper surface is adaxial. Welwitschia mirabilis presents an example of an acaulescent growth habit unusual in so large a plant species.
- Plant Definition
- Plant Characteristics
- Types of Plants
- Related Biology Terms
- Quiz
Plants are multicellular organisms in the kingdom Plantae that use photosynthesis to make their own food. There are over 300,000 species of plants; common examples of plants include grasses, trees, and shrubs. Plants have an important role in the world’s ecosystems. They produce most of the world’s oxygen, and are important in the food chain, as ma...
Plants are autotrophs; they produce their own food. They do so via photosynthesis, which is the process of making nutrients such as sugars from light energy and carbon dioxide. Photosynthesis occurs in cell organelles called chloroplasts, which contain chlorophyll and carotenoids, molecules that absorb light energy and change it into a usable form....
Charophytes
Charophytes are complex green algae such as stoneworts. They have cells with chloroplasts, cell walls containing cellulose, and store starch, as plants do. They reproduce sexually and some have sperm with flagella (tails that allow them to move), just like some plants do. Some fossil stoneworts are very similar to modern day ones.
Bryophytes
Bryophytes are nonvascular land plants. They do not have vascular tissue, which is tissue that transports water and nutrients. They are found both on land and in water. Common examples of bryophytes are mosses, liverworts, and hornworts. Bryophytes are generally very similar to algae in their lack of a vascular system. They do have parts similar to roots, stems, and leaves, but these are not the true roots, stems, and leaves found in vascular plants. Liverworts were probably the first land pl...
Seedless Vascular Plants
Seedless vascular plants produce embryos that are not protected by seeds. Instead, they reproduce via spores. Members of this group include ferns, horsetails, quillworts, clubmosses, and spikemosses. These plants used to be called pteridophytes, but this turned out to be an inaccurate group because ferns and horsetails are more closely related to seed plants than to quillworts, clubmosses, and spikemosses. Seedless vascular plants flourished during the Devonian period and in Carboniferous for...
Eukaryotic cell– A relatively large cell with a true nucleus and organelles.Chloroplast– An organelle found in plant cells that contains chlorophyll; it is where photosynthesis takes place.Organelle– A specialized structure within a cell that carries out a certain function in that cell.Alternation of generations– The alternation of diploid and haploid stages in a plant’s life cycle.1. Which is NOT a characteristic of plants? A. Asexual reproduction B. Sexual reproduction C. Heterotrophy D.Autotrophy 2. The gametophyte is ______ and produces ______ during reproduction. A. haploid; spores B. haploid; gametes C. diploid; spores D.diploid; gametes 3. Which plant is a gymnosperm? A. Pine tree B. Apple tree C. Moss D.Fern
Ø There are two types of articulate laticifers: (i). Articulate anastomosing (ii). Articulate non- anastomosing (i). Articulate anastomosing. Ø In articulate anastomosing laticifers, lateral connections are established with similar laticifers to form reticulate (network) structures. Ø Example: Hevea, Manihot (ii). Articulated non-anastomosing
Sep 20, 2020 · A morphological description usually starts with the structure of a plant. Plant stems with vascular tissue support leaves and reproductive structures such as flowers. Depending on the type of plant, stems may be woody or herbaceous, and solid or hollow in cross section.
May 18, 2024 · Plants\(_2\) are all organisms from Vegetabilia kingdom. Normally, plants\(_2\) are green organisms with a stem and leaves. We can define them also as multi-tissued, terrestrial, and primarily photosynthetic eukaryotes. This definition is taxonomical (based on evolution).
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May 14, 2024 · A plant refers to any of the eukaryotes that belong to the biological kingdom Plantae. Plants, in the strictest sense, are embryophytes that include vascular plants, liverworts, hornworts, and mosses. Some references that are less strict considered green algae as plants.
