Differentiate between Male pine cone and Female pine cone.

Differentiate between male and female heterogamety.

Explain the mechanism of sex-determination in humans. b) Differentiate between male heterogamety and female heterogamety with the help of an example of each.

a) Explain the mechanism of sex-determination in humans. b) Differentiate between male heterogamety and female heterogamety with the help of an example of each.

Draw a labelled diagram of a sectional view of human seminiferous tubule. (b) Differentiate between gametogenesis in human males and females on the basis of (i) time of initiation of the process. (ii) Products formed at the end of the process.

Draw a labelled diagram of a sectional view of humen seminiferous tubule. (b) Differentiate between gametogenesis in humen males and females on the basis of (i) time of initation of the process. (ii) Products formed at the end of the process.

Draw a labelled diagram of a sectional view of humen seminiferous tubule. (b) Differentiate between gametogenesis in humen males and females on the basis of (i) time of initation of the process. (ii) Products formed at the end of the process.

(a) Draw a diagrammatic sectional view of a seminiferous tubule (enlarged) of human male and label (i) Spermatogenium, (ii) Sertoli cell, (iii) Primary spermatocyte. Write the function of each labelled part. (b) Differentiate between spermatogenesis and spermiogenesis.

Differentiate between the two cells enclosed in a mature male gaemetophyte of an angiosperm.

Differentiate between the two cells enclosed in a mature male gaemetophyte of an angiosperm.

a) Draw a labelled diagmmatic view of human male reproductive system. b) Differentiate between: i) Vas deferens and vasa efferentia ii) Spermatogenesis and spermeogenesis