RNA polymerase binds to the promoter and initiates transcription (initiation). It uses nucleosides triphosphates as substrate and polymerises in a template dependent fashion following Read More …
Category: NCERT
Which disease there is point mutation , where there is single base pair change in betaglobulin chain of haemoglobin?
Sickle cell anaemia
The sex determination mechanism in grasshopper is : a) XY type b)XO type c)d)ZW type ZZ type
insects it is XO type , so b)
Rohit has attained puberty, but there is still a significant decrease in his hypothalamic hormones. How will it affect his reproductive growth.?
If hypothalamic hormones will decrease then it will affect spermatogenesis and spermiation in him. Hypothalamus releases GnRH ( Gonadotrophin releasing Hormones ) which stimulate Read More …
Give diagrammatic sectional view of the human ovary showing the stages of development in ovarian follicles
Draw a diagram of female reproductive system
Tropical forests account for greater biodiversity than temperate regions . Give Reasons.
Speciation is a function of time. Temperate regions were subjected to frequent glaciations in the past while tropics have remained somewhat undisturbed for millions Read More …
Differentiate between Autogamy and Xenogamy.
Autogamy 1.transfer of pollen grains from the anther to stigma of same flower. 2. genetically same type of pollens are brought to the Read More …