HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Important Questions for Biology

Explain the process of early cleavage till the formation of morula.

Describe the changes involved during gastrulation.

Describe the structure of blastula.

Definition and importance of Parturition

Write a brief note on the causes of infertility.

What does IUCD indicate?

After puberty human female shows cyclic changes in her reproductive system. Explain structural and hormonal changes in the uterus.

                                      (OR)

Give reasons :
(1) Scrotal sac serves as thermoregulator.
(2) Corpus luteum gets converted into corpus albicans in absence of fertilization.
(3) Missing of menses is the first indication of pregnancy.
(4) Surgical sterilization is a permanent method of birth control. (5) Human egg is microlecithal.

Why is zona pellucid retained around the egg till it reaches the uterus?

Draw a neat and well-labeled diagram showing T.S. of the ovary and describe the menstrual cycle in human females. 

A mother of a one-year-old child wanted to space her second child. Her doctor suggested 'copper- T' Explain its contraceptive action. 

Write a note on HIV.

With the help of labelled diagramms describe the structures of human sperm and unfertilized ovum. 
A couple is unable to conceive. Which modern techniques are available to overcome this problem? 

Multiple choice question.

Test tube baby technique is called _______.

Fill in the blank:

The primary sex organ in human male is _______.

Short answer question.

Write a note on IVF.

Answer the following question.

Describe the various methods of birth control to avoid pregnancy.

Answer the following question.

What are the goals of RCH programme.

Describe the process of fertilization.

Meanrch, menstrual cycle, and menopause are controlled by ______.

Name the hydrolytic enzyme secreted by the acrosome.