Biology Presentation b· SlidesMania.pptx

Historically, as in Aristotle's biology, the plant kingdom encompassed all living things that were not animals, and included algae and fungi. Definitions have narrowed since then; current definitions exclude the fungi and some of the algae. By the definition used in this article, plants form the clade Viridiplantae (green plants), which consists of the green algae and the embryophytes or land plants (hornworts, liverworts, mosses, lycophytes, ferns, conifers and other gymnosperms, and flowering plants). A definition based on genomes includes the Viridiplantae, along with the red algae and the glaucophytes, in the clade Archaeplastida.There are about 380,000 known species of plants, of which the majority, some 260,000, produce seeds. They range in size from single cells to the tallest trees. Green plants provide a substantial proportion of the world's molecular oxygen; the sugars they create supply the energy for most of Earth's ecosystems and other organisms, including animals, either consume plants directly or rely on organisms which do so.

Grain, fruit, and vegetables are basic human foods and have been domesticated for millennia. People use plants for many purposes, such as building materials, ornaments, writing materials, and, in great variety, for medicines. The scientific study of plants is known as botany, a branch of biology.All living things were traditionally placed into one of two groups, plants and animals. This classification dates from Aristotle (384–322 BC), who distinguished different levels of beings in his biology,[5] based on whether living things had a "sensitive soul" or like plants only a "vegetative soul".[6] Theophrastus, Aristotle's student, continued his work in plant taxonomy and classification.[7] Much later, Linnaeus (1707–1778) created the basis of the modern system of scientific classification, but retained the animal and plant kingdoms, naming the plant kingdom the Vegetabilia.[7]


Alternative concepts
When the name Plantae or plant is applied to a specific group of organisms or taxa, it usually refers to one of four concepts. From least to most inclusive, these four groupings are:There are about 382,000 accepted species of plants,[15] of which the great majority, some 283,000, produce seeds.[16] The table below shows some species count estimates of different green plant (Viridiplantae) divisions. About 85–90% of all plants are flowering plants. Several projects are currently attempting to collect records on all plant species in online databases, e.g. the World Flora Online.[15][17]

Plants range in scale from single-celled organisms such as desmids (from 10 micrometres across) and picozoa (less than 3 micrometres across),[18][19] to the largest trees (megaflora) such as the conifer Sequoia sempervirens (up to 380 feet (120 m) tall ) and the angiosperm Eucalyptus regnans (up to 325 feet (99 m) tall ). The ancestors of land plants evolved in water. An algal scum formed on the land 1,200 million years ago, but it w

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4. 01 Add a brief introduction of your section here. Let’s dive in and get to know some interesting facts about animals! We will talk about this first.

5. Did you know? Elephants and storms. Did you know that elephants can sense storms? Elephants may be able to detect a thunderstorm from hundreds of miles away, and will head towards it, looking for water.

6. Did you know? Did you know that a cat uses its whiskers as feelers to determine if a space is too small to squeeze through? Also, cats love to sleep. A fifteen-year-old cat has probably spent ten years of its life sleeping. Did you know that dogs can smell your feelings? Dogs can pick up on subtle changes in your scent, which can help him figure out how you are feeling, such as by smelling your perspiration when you become nervous or fearful. A m an's best friend... Mmm, can I fit in?...

7. Clearly, animals know more than we think, and think a great deal more than we know. ― Irene M. Pepperberg

8. Did you know? Pandas don’t hibernate. It is estimated that more than 50 million kangaroos live there. They are Australia’s national symbol and appear on postage stamps, coins, and airplanes. T here are more kangaroos than humans in Australia. Koalas don’t have much energy and, when not feasting on leaves, they spend their time dozing in the branches. Believe it or not, they can sleep for up to 18 hours a day! Koalas are even more lazy than cats. When winter approaches, they head lower down their mountain homes to warmer temperatures, where they continue to chomp away on bamboo!

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12. Some facts about my cats. Traveled by plane. Twice! Of my cats are adorable. 100% 25% 75% Are females.

13. Let’s review some facts. Elephants Koalas are even more lazy than cats. Dogs Elephants can sense storms. Cats Dogs can smell your feelings. Pandas Kangaroos Koalas Pandas don’t hibernate. There are more kangaroos than humans in Australia. Cats use their whiskers as feelers to determine if a space is too small to squeeze through.

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22. Parts of a plant Flower Root Leaf Fruit Stem

23. Parts of a flower Anther Filament Stigma Ovary Style Stem Ovule Petal Pollen tube

24. Different types of cells. Red blood cells Liver cells Stem cells

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