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Plant - Plant Evolution And Classification, Evolution Of Plants, Classification Of Plants, Plant Structure, Plant Development

life biologists chlorophyll phase

A plant is an organism in the kingdom Plantae. According to the five-kingdom classification system used by most biologists, plants have the following characteristics: they are multicellular during part of their life; they are eukaryotic, in that their cells have nuclei; they reproduce sexually; they have chloroplasts with chlorophyll-a, chlorophyll-b and carotenoids as photosynthetic pigments; they have cell walls with cellulose, a complex carbohydrate; they have life cycles with an alternation of a sporophyte phase and a gametophyte phase; they develop organs which become specialized for photosynthesis, reproduction, or mineral uptake; and most live on land during their life cycle.

Biologists have identified about 500,000 species of plants, although there are many undiscovered species in the tropics.


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over 9 years ago

I think a lot of biologists would now say a six kingdom classification system is correct. Monera has been split into the Eubacteria and the Archeabacteria.

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Plant - Plant Evolution And Classification, Evolution Of Plants, Classification Of Plants, Plant Structure, Plant Development

life phase chlorophyll biologists species kingdom

A plant is an organism in the kingdom Plantae. According to the five-kingdom classification system used by most biologists, plants have the following characteristics: they are multicellular during part of their life; they are eukaryotic, in that their cells have nuclei; they reproduce sexually; they have chloroplasts with chlorophyll-a, chlorophyll-b and carotenoids as photosynthetic pigments; they have cell walls with cellulose, a complex carbohydrate; they have life cycles with an alternation of a sporophyte phase and a gametophyte phase; they develop organs which become specialized for photosynthesis, reproduction, or mineral uptake; and most live on land during their life cycle.

Biologists have identified about 500,000 species of plants, although there are many undiscovered species in the tropics.

Additional Topics
Plant - Plant Evolution And Classification

From the time of Aristotle until the 1950s, most people classified all organisms into the animal kingdom or the plant kingdom. Fungi and plant-like, single-celled organisms were placed into the plant kingdom, in view of certain highly derived, but superficial characteristics of these organisms. In 1959, Robert Whittaker advocated a five-kingdom classification system. According to a recent modifica…
Plant - Evolution Of Plants

There was little life on land 500 million years ago, although the oceans abounded with diverse photosynthetic organisms, as well as species in the Monera, Protoctista, and Animalia kingdoms. Land plants appear to have evolved from photosynthetic, aquatic ancestors about 500 million years ago, probably from the Chlorophyta, or green algae. Both groups use chlorophyll-a and chlorophyll-b as photosyn…
Plant - Classification Of Plants

All species are classified hierarchically. Related species are grouped into a genus; related genera into a family; related families into an order; related orders into a class; related classes into a phylum; and related phyla into a kingdom. Below, the most significant characteristics of the nine phyla of the kingdom Plantae are briefly considered. Bryophyta is a phylum with three classes, the larg…
Plant - Plant Structure

The seed plants (gymnosperms and angiosperms) are the dominant and most studied group of plants, so their anatomy and development are considered here. The leaves and other aerial portions are all covered with a cuticle, a waxy layer that inhibits water loss. The leaves have stomata, microscopic pores which open in response to certain environmental cues for uptake of carbon dioxide and release of o…
Plant - Plant Development

As a plant grows, it undergoes developmental changes, known as morphogenesis, which include the formation of specialized tissues and organs. Most plants continually produce new sets of organs, such as leaves, flowers, and fruits, as they grow. In contrast, animals typically develop their organs only once, and these organs merely increase in size as the animal grows. The meristematic tissues of pla…
Plant - Characteristics Of Plant Cells
Plant - Cell Structures And Their Functions

The cells of plants, fungi, and bacteria are surrounded by rigid cell walls. Plant cell walls are typically one to five micrometers thick, and their primary constituent is cellulose, a molecule consisting of many glucose units connected end-to-end. In plant cell walls, many cellulose molecules are bundled together into microfibrils (small fibers), like the fibers of a string. These microfibrils ha…
Plant - Importance To Humans

Plants provide food to humans and all other nonphotosynthetic organisms, either directly or indirectly. Agriculture began about 10,000 years ago in the fertile crescent of the Near East, where people first cultivated wheat and barley. Scientists believe that as people of the fertile crescent gathered wild seeds, they selected for certain genetically determined traits, which made the plants produce…
plant [next] [back] plano-convex lens
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Plant - Plant Evolution And Classification, Evolution Of Plants, Classification Of Plants, Plant Structure, Plant Development
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Research into secondary plant metabolism primarily took off in the latter half of the 19th century, however, there was still much confusion over what the exact function and usefulness of these compounds were.

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Plant Evolution And Classification, Evolution Of Plants, Classification Of Plants, Plant Structure, Plant Development - Life, Phase, Chlorophyll, and Biologists - JRank Articles http://science.jrank.org/pages/5277/Plant.html#ixzz2RY6nrVyZ

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Secondary plant metabolism contains products that aid in the growth and development of plants, however they are not required for the plant to survive. Secondary metabolism facilitates the primary metabolism in plants. This primary metabolism consists of chemical reactions that allow the plant to live.

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Plants, also called green plants (Viridiplantae in Latin), are living organisms of the kingdom Plantae including such multicellular groups as flowering plants, conifers, ferns and mosses, as well as, depending on definition, the green algae, but not red or brown seaweeds like kelp, nor fungi or bacteria.

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Secondary plant metabolism contains products that aid in the growth and development of plants, however they are not required for the plant to survive. Secondary metabolism facilitates the primary metabolism in plants.

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