Question

Differentiate between the following pairs on the basis of what is mentioned in brackets.
i) Natality and mortality (definition)
ii) Stoma and stroma (describe its structure)
iii) Acromegaly and cretinism (symptoms)
iv) Transpiration and guttation (structures involved)
v) Diabetes mellitus and diabetes insipidus(reason/cause)

Answer 1

i) Natality is the number of live births per 1000 per year.

Mortality is the number of deaths per 1000 per year.

ii) Stoma - The opening of the stomata through which transpired water and respiratory gases pass.

Stroma- It is the part/region in the chloroplast where the dark reaction of photosynthesis takes place.

iii) Acromegaly - Overgrowth of certain parts of the body like cheek bones etc, due to oversecretion of growth hormone in adults.

Cretinism- Dwarfism and mental retardation due to under secretion of thyroxine in children.

iv) Transpiration - Stomata/cuticle/lenticels

Guttation - Hydathodes

v) Diabetes mellitus- Undersection of insulin due to which level of glucose increases in blood.

Diabetes insipidus - Undersection of Antidiuretic hormone due to which reabsorption of water from kidney tubules becomes