Tài liệu Sinh Học

Carbohydrates include sugars and the polymers of sugars The simplest carbohydrates are monosaccharides, or single sugars Carbohydrate macromolecules are polysaccharides, polymers composed of many sugar building blocks

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The electron configuration of carbon gives it covalent compatibility with many different elements The valences of carbon and its most frequent partners (hydrogen, oxygen, and nitrogen) are the “building code” that governs the architecture of living molecules

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Kinetic energy is the energy of motion Heat is a measure of the total amount of kinetic energy due to molecular motion Temperature measures the intensity of heat due to the average kinetic energy of molecules

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Atoms are composed of subatomic particles Relevant subatomic particles include Neutrons (no electrical charge) Protons (positive charge) Electrons (negative charge)

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II. Vai trò và ý nghĩa của virus trong sản xuất nông nghiệp Virus sản xuất thuốc trừ sâu Baculovirus NPV ( SNPV & MNPV ) GV CPV

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Microbes that penetrate the first line of defense face the second line of defense, which depends mainly on phagocytosis, the ingestion of invading organisms by certain types of white cells. Phagocyte function is intimately associated with an effective inflammatory response and also with certain antimicrobial proteins.

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The body plan of a hydra and other cnidarians makes a circulatory system unnecessary. A body wall only two cells thick encloses a central gastrovascular cavity that serves for both digestion and for diffusion of substances throughout the body. The fluid inside the cavity is continuous with the water outside through a single opening, the mouth. T...

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The liver performs a wide variety of important functions in the body, including the production of bile. Bile is stored in the gallbladder until needed. It contains bile salts which act as detergents that aid in the digestion and absorption of fats. Bile also contains pigments that are by-products of red blood cell destruction in the liver. Thes...

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Occurring in sheets of tightly packed cells, epithelial tissue covers the outside of the body and lines organs and cavities within the body. The cells of a epithelium are closely joined and in many epithelia, the cells are riveted together by tight junctions. The epithelium functions as a barrier protecting against mechanical injury, invasive mic...

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In general, plant hormones control plant growth and development by affecting the division, elongation, and differentiation of cells. Some hormones also mediate shorter-term physiological responses of plants to environmental stimuli. Each hormone has multiple effects, depending on its site of action, its concentration, and the developmental stage ...

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