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proteins necessitythey are called as body buildersthe proteins are used in various metabolic pathways and body buildingthey help in repairing the
care required by a hiv infected person1 an hiv infected person needs acceptance and support from the family members the home is very important
precautions to prevent from hiv to avoid hiv infection one should practice safe sex use of condoms besides a few simple precautions are given
protraction from hiv under the following conditions hiv is not transmitted1 the secretions and body fluids like saliva tears sweat faeces and
formation of female gametesovule develops from a cushion like part of the ovary called the placenta ovule is connected to the placenta by a stalk
uses of graftinggrafting helps to preserve and perpetuate varieties that cannot reproduce by vegetative methodgrafting changes less useful
advantages of vegetative propagationvegetative propagation helps to maintain fixed qualities and characteristic features of the parent plantfor
importance of reproductionreproduction is an important life process in animals and plantsreproduction is the ability of an organism to produce new
spinal nervesthey take their origin from the spinal cordthey are the mixed nerves having both sensory and motor fibres there are 31 pairs of
craninal nervescranial nerves take their origin from different areas of brain some of them are sensory some are motor and a few are mixed
spinal cordspinal cord is a long and cylindrical structureit passes through the vertebral column extending all along the dorsal surface
functions of cerebrumthe forebrain is otherwise called as lsquocerebrumit is highest centre for controlling several functions in the bodythe most
motor nerves nerves which carry impulses from brain or spinal cord to effector organs are called efferent or motor nerves stimulation of motor
hormones secreted by gonads1 testis and ovary are called gonads in the human body2 apart from producing gametes gonads also secrete hormonestestis
importance of pituitary glandpitutary gland is very small and it is about the size of a large pea seedit is very important as it controls the
endocrine glandsendocrine glands have no ducts - so these are also called as ductless glands egpituitary etcthese glands secrete chemical
gibberellins in plant growth gibberellins were first isolated from the culture of a fungus gibberella fujikuorigibberellins has a significant
auxinsauxins are plant growth substances the term auxin usually refers to a chemical compound called indole acetic acid iaa which is the major
growth and development of multi cellular organismsthe normal growth and development in all multicellular organisms occur in a programmed mannerthe
refining of petroleumpetroleum crude extracted from earths crust is an intimate mixture of many organic compounds crude petroleum needs to be
manufacture of cementcement is a composite mixture of calcium silicates amp calcium aluminates which is a popular material used for construction1
factors that effect the solubility of a solute the solubility of a solute is effected by three factors like1 nature of solute2 nature of solvent3
population inversionthe process in which the number of electrons n2 in a higher energy state called lsquometastable state of an active medium is
phenomenon of interference of water waves1 arrange two identical adjacent pins s1 and s2 vibrating in a ripple tank with the same frequency2 in
ripple tankthe concept of reflection and refraction of light waves can be understood by the study of reflection and refraction of waves on water