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प्रश्न
Give appropriate term of the following:
The onset of reproductive phase in a young female.
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उत्तर
Menarche
संबंधित प्रश्न
Suggest three contraceptive methods to control the size of human population, which is essential for the health and prosperity of a country. State the basic principle involved in each.
Give appropriate biological/technical terms for the following:
The kind of twins formed from two fertilized eggs.
Give biological explanations for All the food chains begin with green plants.
Which part of the human body produces sperms?
When a human female reaches a certain age then vaginal bleeding occurs for a few days after regular time intervals.
(a) What is this process known as (i) in scientific terms, and (ii) in everyday language?
(b) At what approximate age this process starts in human females? When is the human female said to have attained at this stage?
(c) After how much time is this process repeated? For how many days does this process usually last?
(d) What does the onset of this process in human females signify?
(e) At which particular event in the life of a human female does this process stop temporarily but start again?
(f) At which approximate age of human female does this process stop permanently?
Explain how the transmission of virus and bacteria diseases be prevented?
Trace the path of sperms from where they are produced in human body to the exterior.
Write the functions of secretions of prostate gland and seminal vesicles in humans.
Name the following:
Male and Female organs on specific individuals.
Define the following:
Monoceious
