are gymnosperms unicellular or multicellular?
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Gymnosperms. Seeds consist of an embryo already packaged within the seed, and nutritive tissue surrounded by a protective coat. 1. A seed contains a well-developed multicellular young plant with embryonic root, stem, and leaves already formed, whereas a plant spore is a single cell.
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Types of Gymnosperms All gymnosperms are found in four major divisions of plants. The divisions are Ginkgophyta, Cycadophyta, Gnetophyta, and Coniferophyta. The division Ginkgophyta contains the Ginkgo Biloba or Maidenhair tree.
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They are the multicellular, eukaryotic organisms having an autotrophic mode of nutrition. On the support of few factors, this kingdom is further classified into five subgroups like Thallophyta, Bryophyta, Pteridophyta, Gymnosperms, Angiosperms.
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Prokaryotes are usually single-celled organisms, while animal and plant cells are generally multicellular. Eukaryotic cells are more complex and larger than prokaryotic cells. Animal and plant cells contain many organelles not found in prokaryotic cells.
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['Plants are multicellular and eukaryotic, meaning their cells have a nucleus and membrane-bound organelles.', 'Plants perform photosynthesis, the process by which plants capture the energy of sunlight and use carbon dioxide from the air to make their own food.']
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While fungi can be multicellular or unicellular, all fungi have two things in common. First, they all absorb their food externally. Second, all fungi have cell walls made of a tough polysaccharide, called chitin. This allows the fruiting bodies of fungi (i.e. mushrooms) to have upright growth.
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Yeast are single-celled (unicellular) organisms, making them simple to study, but possess a cellular organization similar to that found in higher, multi-cellular organisms such as humans – that is, they possess a nucleus and are therefore eukaryotes, as described above.
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Gymnosperms are vascular plants that produce seeds in cones. Examples include conifers such as pine and spruce trees. The gymnosperm life cycle has a dominant sporophyte generation. Both gametophytes and the next generation's new sporophytes develop on the sporophyte parent plant.
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Unicellular organisms are composed of a single cell, unlike multicellular organisms that are made of many cells. This means that they each live and carry out all of their life processes as one single cell. Most unicellular organisms are microscopic; however, some are visible to the naked eye.
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In actuality, they are mostly rectangular cubes! Plant cells, unlike animal cells, have a cell wall that is made of cellulose and gives them a cuboidal as opposed to spherical structure. Plant cells are not however, uniformly rectangular cubes, different cell types in the plant have different shapes.
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Like angiosperms, gymnosperms also have vessels and companion cells. The vascular system is common for the both of them, consisting of conjoint and vascular bundles (open and collateral). The ovules of both angiosperms and gymnosperms develop into seeds. Their mode of seed germination is epigeal, hypogeal, or both.
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The structure of the unicellular is made up of a single cell. The structure of the multicellular organisms is made up of numerous cells. 2. Amoeba, paramecium, yeast all are examples of unicellular organisms. Few examples of multicellular organisms are human beings, plants, animals, birds, and insects.
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While some primitive gymnosperms have flagellated sperm cells, the sperm in most gymnosperms and all angiosperms lack flagella. In seed plants, the use of resistant, far-traveling, airborne pollen to bring gametes together is a terrestrial adaptation.
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Unicellular fungi are generally referred to as yeasts. Saccharomyces cerevisiae (baker's yeast) and Candida species (the agents of thrush, a common fungal infection) are examples of unicellular fungi. Most fungi are multicellular organisms. They display two distinct morphological stages: vegetative and reproductive.
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Animals, plants, algae and fungi are all eukaryotes. There are also eukaryotes amongst single-celled protists. Unlike unicellular archaea and bacteria, eukaryotes may also be multicellular and include organisms consisting of many cell types forming different kinds of tissue. Prokaryotes are singled cell organisms.
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The multicellular diploid plant structure is called the sporophyte, which produces spores through meiotic (asexual) division. The multicellular haploid plant structure is called the gametophyte, which is formed from the spore and give rise to the haploid gametes.
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Unicellular eukaryotes are single-celled micro-organisms with a defined nucleus, mitochondria and other organelles. They include phytoplankton, or algae, and zooplankton, or protozoa. Unicellular eukaryotes originated billions of years ago.