Topic 9: Plant Science 9.1 Plant Structure and Growth 9.1.1 Draw and label plan diagrams to show the distribution of tissues in the stem and leaf of a dicotyledonous plant. Cross-section of a stem Part of plant | Purpose | Epidermis | Surface of the stem made of a number of layers often with a waxy cuticle to reduce water loss | Cortex Tissue | Forming a cylinder of tissue around the outer edge of the stem. Often contains cells with secondary thickening in the cell walls which provides
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Local Literature Crab shells polvoron By Dr. Dolores DG. Fernandez Chief SRS‚ PCAMRD Crabs are relished for their taste and texture. Low in fat and high in protein‚ crabs are excellent sources of minerals. The crab’s body is covered with a chitinous shell or carapace. This crab cover is simply thrown away. Professor Viden V. Elpos of the Northern Iloilo Polytechnic State College in Concepcion‚ Iloilo conducted a study on the acceptability of polvoron made from the carapace of different crab
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Spring is here‚ and it brings with it sneezes‚ sniffles‚ runny nose and often hay fever. As the trees bloom they release pollen in the air and this causes the people suffering from allergies to sniffle and sneeze throughout the season. Common allergy medicines have become a staple in every household and mostly people cannot survive the day without taking one. If it is not the pollen‚ then many people suffer from allergies due to dust‚ animal hair‚ carpets‚ types of foods and even dairy products. Some
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Bats are flying mammals in the order Chiroptera (pronounced /kaɪˈrɒptərə/). The forelimbs of bats are webbed and developed as wings‚ making them the only mammals naturally capable of true and sustained flight. By contrast‚ other mammals said to fly‚ such as flying squirrels‚ gliding possums and colugos‚ glide rather than fly‚ and can only glide for short distances. Bats do not flap their entire forelimbs‚ as birds do‚ but instead flap their spread out digits‚[2] which are very long and covered with
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For other uses‚ see Bat (disambiguation) and Bats (disambiguation). Bat Temporal range: 52–0Ma PreЄЄOSDCPTJKPgN Early Eocene – Recent Townsend’s big-eared bat‚ Corynorhinus townsendii Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Infraclass: Eutheria Superorder: Laurasiatheria[1] Order: Chiroptera Blumenbach‚ 1779 Suborders See article Worldwide distribution of bat species Bats are mammals of the order Chiroptera (/kaɪˈrɒptərə/; from the Greek
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electricity power plants * polluting the air by burning wood in stoves * the paint we use * aerosol sprays and most of the cleaning products we use Natural causes are: * Smoke and a gas called carbon monoxide * wind erosion * pollen * Methane gas from farm animals and rotting plants * Radon gas and poisonous gasses from erupting volcanoes. We can all do our bit to reduce air pollution by using less electricity‚ using gas over wood or charcoal‚ cycling or walking rather
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Pollination o Like many other winged insects‚ what butterflies do for the environment that is perhaps most important is pollinating plants. The diet of adult butterflies consists mostly of nectar from flowers. While gathering nectar‚ the butterflies pick up pollen on their feet and wings and transfer it to neighboring flowers and plants‚ continuing the life cycle of many plants that other animals depend on for survival. Eating Aphids & Rotten Fruit o As caterpillars‚ some butterflies eat aphids in addition
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THE CONCEPT OF SPECIES What are species? Species are the basic taxonomic units of biological classification. This grouping of organisms of "like kind" into discrete and stable units has been traced at least from the time of Plato and Aristotle. The term derives from the Latin "specere" (to look at‚ to behold)‚ with the meaning of "kind‚“ "quality‚" "appearance‚" "shape‚" or "a peculiar sort.“ In the past‚ species were classified according to their shape. Carl Linnaeus (1707-1778)‚ the
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Summary: Monsanto Company is the world’s largest seed company. They specialize in genetic manipulation of organisms. Monsanto was founded by John E Queeny in 1901 in St. Louis‚ Missouri. The company’s first product was artificial sweetener. At the start of World War 1‚ company leader realized the growth opportunities of industrial chemicals. In 1970’s‚ Monsanto had produced a chemical known as Agent Orange. Agent Orange contained dioxin; a chemical that caused a legal nightmare
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into the olfactory bulb. The olfactory bulb is directly attached to the cerebral cortex of your brain. As you breathe‚ anything that is in the air that you take in enters your nasal cavity: hydrogen‚ oxygen‚ nitrogen‚ dust‚ pollen‚ chemicals. You don’t “smell” air or dust or pollen‚ but you can smell chemicals. The olfactory cells are chemoreceptors‚ which means the olfactory cells have protein receptors that can detect subtle differences in chemicals. The chemicals bind to the cilia‚ which generate
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