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presence of lateral line for protection.presence of gills or operculum for gaseous exchange.Give the characteristics of the following classes of chordate triploblastic (three layer body-ectoderm, mesoderm and endoderm).dorsal slits (pharyngeal cleft during development).G) i) State the general characteristics of chordate biological control of pests and other organisms.Iii) State the economic importance of insects body divided into two parts( abdomen and cephalothorax).have pincers (modified legs) to catch prey.last pair of legs pointing backwards with poison claws called maxillipedes.State the characteristics of the following classes of arthropoda poisons, weeds, injurious (stinging nettles, thorns), water hyacinthį) i) Give the general characteristics of phylum arthropoda flowers, shade/shelter, live fences, windbreaks forests and grassland) for animals which may also be tourist attraction food, medicine, timber, paper and clothing reduce soil erosion by bind soil particles together.balancing carbon IV oxide and oxygen in the atmosphere during photosynthesis and.Name the classes and state characteristics of angiospermae flowers bisexual hence double fertilization.well differentiated into roots, stems and leavesĮ) Name sub-divisions of spermatophyte and state the characteristics of each class.body pans not differentiated into root, stem, leaves.lack of vascular tissues (lack phloem and xylem).denitrifying bacteria reduce soil fertility/convert nitrates into nitrogen/reduce nitratesĭ) State the main characteristics of the following division of kingdom plantae.nitrifying and nitrogen fixing bacteria increase soil fertility/make nitrates available.many bacteria cause‘ food spoilage/decay.some diseases in animals/humans and plants are caused by bacteria.symbiotic bacteria in herbivores/ruminants help in digestion.symbiotic bacteria are used in compost decomposition or cause decay.saprophytic bacteria are used in compost decomposition or cause decay.in septic tanks and modern sewage Works make use of bacteria.vinegar, acetic acid, lactic acid, citric acid.fermentation of cheese, butter, milk yoghurt.are useful in the manufacture of antibiotics.mycorrhizal association in forest development may help in Water intake/absorption.important in recycling nutrients in soil since they cause decay of organic matter.yeast is used in brewing industry, baking and source of vitamin B.some are used in production of antibiotics e.some cause diseases to humans and animals e.have spore forming structures (sporangia).have rhizoids (lackroots, leaves, stem).when cell Walls are present have no cellulose.eukaryotic (most cell organelles present).prokaryotic (genetic material not surrounded by membrane).generic names should be a single unique nameī) State the main characteristics of the five kingdoms of organisms.family names are formed by adding the suffix “idea” to the stem of the genus e.g the.scientific names must be in Latin or should be latinised.Ii) State briefly the general principles of classification of living organisms scientific system of naming organisms using the generic(genus) and specific (species).a) i) What is meant by the term binomial nomenclature?
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