Topics: Pasture, pasture establishment, pasture utilization, forage yield determination, forage conservation, pasture nutritive value, grass morphology, legumes, shrubs, Nigerian vegetation zone, rainforest, guinea savanna, Sudan Savanna, Mangrove zone, plant introduction, Soil fertility, Seedbed Preparation, conventional tillage, no-till seedbed, seeding rate, weed control, forest grazing

Topics: ecosystem, populations, population growth, predation, symbiosis, community stability, nutrition circulation, allelochemics, soil development, soil classification, vegetation, watersheds, biogeochemistry, pollution, radioisotope contamination, pesticides, heavy metals, air pollution, lake production, eutrophication, retrogression, community evolution, human ecology, marine productivity, detritus, biosphere

Topics: Soil microbiology, soil habitats, lithosphere, bacteria, Nitrogen fixers, disease suppressors

Topics: Natural Environment, Animal Production, earth science, environment, geological activity, oceans, rivers, streams, lakes, ponds, climate change, atmosphere, atmospheric layers, global warming, climate, weather, life ecosystems, biomes, biogeochemical cycles, wilderness, Environmental degradation, population growth, agriculture, water management, greenhouse gas emission, Gas effect, emissions, pollution, air pollution, water pollution, land pollution, erosion, coastal erosion, glaciers, floods, freezing, thawing, wind erosion, gravitational erosion, exfoliation, soil structure, soil composition, vegetation cover, topography, agricultural practices, deforestation, urbanization, airborne dust pollution, desertification, Stratospheric Ozone, ozone hole, Antarctica Ozone Theory

Topics: soil water, Salinity, temperature, pH, Radiation, pollution, Benthic region, marine bacteria, Tundra soils, Salt lakes, extreme aquatic environments, Glaciers

Topics: Endocardial tubes, heart tube position, Cardiac folding, heart chambers, Sinus venosus, Heart wall, Ventricles, Septum formation, atrioventricular canal, Atrioventricular valves, Truncus septum formation, arterial cone, Cardiovascular System, Basic Heart, advanced heart, Human Development Timecourse, Heart Volume, Vascular anomaly, Vascular tumors, Infantile Hemangioma, Congenital Hemangioma, Kaposiform Hemangioendothelioma, Pyogenic granuloma, Vascular malformations, Fast flow vascular malformations, Combined-complex vascular malformations, Blood Vessel Development, Endothelial Progenitors, Endothelial Tube Formation, Vascular Endothelial Growth Factor, Capillaries, Electron Micrographs, Cardiac Blood Vessels, Tumor angiogenesis, tumor blood vessels, Macular degeneration, vessel morphology, Oxygen sensing, Wolffian duct, Pronephros, Mesonephros, mullerian duct, Ureteric bud, Metanephrogenic blastema, Urinary bladder, Vesico-urethral portion, Heart Abnormalities, Ventricular Septal Defect, Atrial Septal Defects

Topics: Bacteriology, bacterial taxonomy, bacterial classification, Gram Positive Cocci, Aerobic Gram Positive Rods, Aerobic Gram Negative Bacteria, Anaerobic Bacteria, Vibrios, Spirochaetes, Spirilla, Mycoplasma, Ureaplasma, Obligate Intracellular Bacteria, Bacterial Morphology, Electron microscope, bacterial metabolism

Topics: Bright-Field Light Microscope, Bacterial Motility, Dark-Field Light Microscope, Phase-Contrast Light Microscope, Fluorescence Microscope, Bacterial Morphology, Smear Preparation, Simple Staining, negative staining, gram strain, Acid-Fast Staining, Endospore Staining, Capsule Staining, Flagella Staining, Microbiological Culture Media, Spread-Plate Technique, Streak-Plate Technique, Anaerobic Bacteria cultivation, Fermentation, Triple Sugar Iron Agar Test, carbohydrates, Starch Hydrolysis, Lipid Hydrolysis, protein, amino acid, Hydrogen Sulfide Production, Casein Hydrolysis, Gelatin Hydrolysis, Catalase Activity, Coagulase Activity, DNase Activity, Amino Acids, Urease Activity, Lysine test, Ornithine Decarboxylase Test, Phenylalanine Deamination, Nitrate Reduction, Osmotic Pressure, temperature, Hand Washing, Environmental Sampling, Microbiological Monitoring, Environmental Microbiology, Food Microbiology, Standard Coliform Most Probable Number Test, Presence-Absence Coliform Test, bacterial count, Medical Microbiology, Agglutination Reactions, Blood Groups, Staphylococci, Pneumococci, Streptococci, Neisseriae, Fungi, yeasts, Phycomycetes, Ascomycetes, Basidiomycetes, Microbial Genetics, Genomics, Bacterial Mutation, Bacterial Transformation, bacterial conjugation

Topics: kingdoms, class, phylum, taxonomy, cryptograms, agricultural microbiology, genetic engineering, higher plants, biotechnology, lower plants, plant biology, morphology of organisms, anatomy of organisms

Topics: Microbiology, Microscopy, Morphology of Bacteria, Physiology of Bacteria, Sterilization, Disinfection, culture media, Culture Methods, bacterial culture, bacterial taxonomy, infection, immunity, immunology, antigens, antibodies, immunoglobulins, complement system, Antigen-Antibody Reactions, Immune Response, immune system, Immunodeficiency Diseases, Hypersensitivity Reactions, autoimmunity, Immunohematology, Systemic Bacteriology, Staphylococcus, Streptococcus, Enterococcus, Pneumococcus, Diplococcus pneumoniae, Neisseria, Moraxella, Corynebacterium, bacillus, Clostridium, Nonsporing Anaerobes, Mycobacterium tuberculosis, Mycobacterium leprae, Nontuberculous Mycobacteria, Actinomycetes, Nocardia, Enterobacteriaceae, Escherichia, Klebsiella, Proteus, shigella, Tribe Proteae, salomonella, Vibrio, Aeromonas, Pleisomonas, Campylobacter, Helicobacter, Pseudomonas, Stenotrophomonas, Burkholderia, Legionella, Yersinia, Pasteurella, Francisella, Haemophilus, Bordetella, brucella, Spirochetes, Mycoplasma, Ureaplasma, Miscellaneous Bacteria, Rickettsiaceae, Bartonellaceae, Coxiella, Virology, Virus-Host Interactions, Viral Infections, Laboratory Diagnosis, Prophylaxis, Chemotherapy of Viral Diseases, Bacteriophages, Poxviruses, Herpesviruses, Adenoviruses, Papovaviruses, parvovirus, picornaviruses, Orthomyxovirus, Paramyxoviruses, Arboviruses, Rhabdoviruses, Hepatitis Viruses, RetrovirusesHuman Immunodeficiency Virus, Slow Virus, Prion Diseases, Oncogenic Viruses, Medical Mycology, Systemic Mycoses, Opportunistic Mycoses, Mycotoxicosis, Infective Syndrome.Hospital-Acquired Infection, Antimicrobial Therapy, Antibiotic Sensitivity Tests, Antimicrobial Chemotherapy, Immunoprophylaxis, Hospital Waste Management, Molecular Detection of Microorganisms, Diagnostic Medical Microbiology