12th Standard Syllabus & Materials
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Published on: 13/05/2022
QB365 provides detailed and simple solution for every Creative Questions in class 12 Biology Subject. It will helps to get more idea about question pattern in every Creative questions with solution.
latest Creative QuestionsDownload Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
In the diagram given below.
(a) Identify the diagram
(b) Label the parts indicated.
2.
What is polymenorrhoea?
3.
What is LH surge?
4.
What is the role of FSH & LH in spermatogenesis?
1.
(a) Human Sperm
(b) 1- Acrosome 2 - Nucleus 3 - Neck
2.
It denotes a menstrual cycle that is shorter than 21 days which may be due to hyperactivity of anterior pituitary gland, psychological disturbances, malnutrition, sexually transmitted disease etc.
3.
During the ovulatory phase of the menstrual cycle, maximum secretion of leutinising hormone occurs during the mid cycle (about 14th day) which is called LH surge and induces ovulation.
4.
(i) FSH stimulates testicular growth and enhances the production of Androgen Binding protein (ABP) by the sertoli cells and helps in the process of spermiogenesis.
(ii) LH acts on the Leydig cells and stimulates the synthesis of testosterone which in turn stimulates the process of spermatogenesis.
12th Standard Syllabus & Materials
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Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
French
Tamilnadu Stateboard Standards
