Differentiate between the following pairs on the basis of what is ment

1.	Differentiate between the following pairs on the basis of what is mentioned within brackets :(i) Human skin cell and. Human ovum (number of chromosomes) (ii) Sperm duct and fallopian tube (function) (iii) Red Cross and WHO (one activity) (iv) Rod cells and cone cells (pigment) (v) LUBB and DUP (names of the valves whose closure produce the sound)
Answer» (i) Natality – Number of live births per 1000 per year. Mortality – Number of deaths per 1000 per year. (ii) Stoma – The opening in the stomata through which transpired water and respiratory gases pass. Stroma – It is the part/region in the chloroplast where dark reaction of photosynthesis takes place. (iii) Acromegaly – Overgrowth of certain parts of body like cheek bones etc. due to oversecretion of growth hormone in adults. Cretinism – Dwarfism and mental retardation due to undersecretion of thyroxine in children. (iv) Transpiration – Stomata/cuticle/lenticels. Guttation – Hydathodes. (v) Diabetes mellitus – Undersecretion of insulin due to which level of glucose increases in blood. Diabetes insipidus – Undersecretion of Antidiuretic hormone due to which reabsorption of water from kidney tubules becomes less.

Differentiate between the following pairs on the basis of what is mentioned within brackets :(i) Human skin cell and. Human ovum (number of chromosomes) (ii) Sperm duct and fallopian tube (function) (iii) Red Cross and WHO (one activity) (iv) Rod cells and cone cells (pigment) (v) LUBB and DUP (names of the valves whose closure produce the sound)

Answer»

(i) Natality – Number of live births per 1000 per year. Mortality – Number of deaths per 1000 per year.

(ii) Stoma – The opening in the stomata through which transpired water and respiratory gases pass. Stroma – It is the part/region in the chloroplast where dark reaction of photosynthesis takes place.

(iii) Acromegaly – Overgrowth of certain parts of body like cheek bones etc. due to oversecretion of growth hormone in adults. Cretinism – Dwarfism and mental retardation due to undersecretion of thyroxine in children.

(iv) Transpiration – Stomata/cuticle/lenticels.

Guttation – Hydathodes.

(v) Diabetes mellitus – Undersecretion of insulin due to which level of glucose increases in blood.

Diabetes insipidus – Undersecretion of Antidiuretic hormone due to which reabsorption of water from kidney tubules becomes less.

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