Biology DB 5 Essay Example | Topics and Well Written Essays - 500 words

Biology DB 5 - Essay Example Support is a function that is mainly conducted by the stem, and for this reason a yam is modification of a normal plant. Botanically yams are in the family of monocotyledonous referred to as Dioscoreaceae and genus Dioscorea. The main reason as to why they are grown is because of their tuber or storage organs. The root cortex of a yam as compared to that of a corn is huge, which enables it to store sugar, starch and other substances. Casparian strip, which is water-impermeable strip of waxy material situated in the endodermis does not control uptake of minerals into the xylem as compared to other plants such as corn plants. This is because most of the minerals are stored and retained in the root, which functions as a stem. Yam as a plant can be said to support leaves because a stem is absent, the anatomy of yam as a plant can be said to be a modification of other standard plant. Animals and animal products are beneficial to human beings for different purposes other than for food. Animal products are highly beneficial in production of materials for clothes. Pigs are essential in production of valuable products such as suede for manufacture of clothes and production of shoes. Cattle produce leather which is sourced from the hides in the animal skin. The leather is used in the manufacture of clothes, shoes, purses, wallets and car upholstery. Feathers from poultry especially from geese and ducks are important in stuffing down clothes such as pillows and jackets. Sheep is a great source of wool that is used in processing yarn for knitting socks, shirts and other different cloths. Rabbits are a source of far used in knitting socks, yarn and other types of clothing. The most important benefit of animals is medicinal applications. Animal products have been tested methodically as a source of drugs especially in modern medicine. For instance, a snake venom is used as an