Comment upon the following:
A single sperm fertilises an ovum, still more than 300 million sperms are present in each ejaculation.

How many sperms are present in an average 3 ml ejaculation

Comment upon the following: The urine is slightly thicker in summer than in winter.

Comment upon the following: When an ovum getsfertilised, menstrual cycle stops temporarily in a woman?

More than two leaves are present at each node in

Comment upon the following: Diameter of afferent arteriole and its capillaries is more than the diameter of efferent arteriole and its capillaries.

With reference to the above schematic representation of (a) SQPermatogenesis and (b) Oogenesis answer the following questions: (a) About 300 million SQPermatozoa may be present in a human male ejaculation at one time. Calculate how many SQPermatocytes will be involved to produce 300 SQPermatozoa. (b) How many chromatids are found during Oogenesis in (i) Primary oocyte and (ii) First polar body in a human female?

Number of sperms present in a single ejaculation of semen contains

Comment upon the following : A higher rate of transpiration is recorded on windy days rather than on a calm day.

Comment upon the following: Micturition is more frequent during winter as compared to summer.

Comment upon the following: Blood entering the kidney has more glucose than the blood leaving the kidney but urine contains no glucose.