HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

Describe any three adaptations in anemophilous flowers.

With the help of a neat, labelled diagram describe the human male reproductive system.

Describe the T.S. of human testis

Write a note on human sperm

Identify the permanent birth control method in given diagram.

Identify the IUD in the given diagram.

Identify the parts labelled in the given diagram.

Human pregnancy shows three prominent trimesters. Answer the following question based on these trimester.

1. What is morning sickness during the first trimester?
2. Name the hormone secreted in the second trimester.
3. The organ which secretes hormone in second trimester is

Describe hormonal control in various phases of the menstrual cycle.

Expand the term ZIFT.

What is a test cross?

Answer the following questions related to sex determination in human beings:
i. What is sex chromosome?
ii. How many pairs of chromosomes are present in human beings?
iii. How is the sex of the human offspring determined?
iv. Draw a diagram depicting sex determination in man.

Explain the mechanism of sex determination in birds.

What is the reason for the 21^st trisomy?

Give reasons for the development of Turner’s syndrome and also mention its symptoms.

Identify chromosomal disorder caused due to non-disjunction of the 21^st number of chromosomes and enlist its symptoms.

______ enzymes are used as biological scissors in r-DNA technology.

What is Bacteriophage?

What is degeneracy of genetic code?

How t-RNA act as an adapter molecule?
Explain in detail with the help of a diagram.