Chapter wise questions of zoology:class XII

 Chapter wise Questions of zoology_ XII

1. Animal tissue:

1. List the functions of epithelial tissue.

2. What are the types of simple epithelium? Give one example and function of each type.

3. write about pseudostratified epithelium.

Application Biology

Amniocentesis:-  It is a technique in which the amniotic fluid is analyzed in early stage of foetal development. The amniotic fluid surrounds the developing foetus in uterus and also contains the cells of developing foetus. It is done on about 14 or 15 weeks after conception.

During it,

-Ultrasonography is done to locate the position of the foetus in uterus.

-The amniotic fluid is taken out from the uterus by the help of surgical needle.

-The amniotic fluid is centrifuged to separate the cells of foetus and

-The cells are cultured for some time and are analyzed. 

The analysis of cells is done in two ways: karyotype analysis and Biochemical analysis.