12th Standard CBSE Syllabus & Materials
12th Standard CBSE
CBSE 12th Economics Government Budget and the Economy Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Interface Python with MySQL - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Database Concept - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Data Communication - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Data Structures - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Computer Science Functions - New Previous year Question Papers Study Material - QB365 Set A
Published on: 24/05/2021
QB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks
Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology
Questions + Answers key
Take MCQ Biology Test1.
The membranous cover of the ovum at ovulation is
Corona radiata
Zona radiata
Zona pellucida
Chorion
2.
Match the following and choose the correct options:
| A | Trophoblast | Embedding of blastocyst in the endometrium |
| B | Cleavage | Group of cells that would differentiate as embryo |
| C | Inner cell mass | Outer layer of blastocyst attached to the endometrium |
| D | Implantation | Mitotic division of zygote |
A-(II), B-(I), C-(III), D-(IV)
A-(III), B-(IV), C-(II), D-(I)
A-(III), B-(I), C-(II), D-(I)
A-(II), B-(IV), C-(III), D-(I)
3.
The correct sequence of spermatogenic stages leading to the formation of sperms in a mature human testis is
spermatogonia-spermatid-spermatocyte-sperms
spermatocyte-spermatogonia-spermatid-sperms
spermatogonia-spermatocyte-spermatid-sperms
spermatid-spermatocyte-spermatogonia-sperms
4.
Which one of the following is the most likely root cause why menstruation is not taking place in the regularly cycling human female?
retention of well-developed corpus luteum
fertilization of the ovum
maintenance of the hypertrophical endometrial lining
maintenance of high conc. of sex hormones in the blood stream
5.
Which one of the following is the correct matching of the events occurring during menstrual cycle?
Menstruation: breakdown of myometrium and ovum not fertilized
Ovulation:LH and FSH attain peak level and sharp fall the in secretion of progesterone.
Proliferative phase: Rapid regeneration of myometrium and maturation of Graafian follicle
Development of corpus luteum: Secretary phase and increased secretion of progesterone
1.
(a)
Corona radiata
2.
(c)
A-(III), B-(I), C-(II), D-(I)
3.
(c)
spermatogonia-spermatocyte-spermatid-sperms
4.
(d)
maintenance of high conc. of sex hormones in the blood stream
5.
(d)
Development of corpus luteum: Secretary phase and increased secretion of progesterone
12th Standard CBSE Syllabus & Materials
12th Standard CBSE
CBSE 12th Computer Science Python Revision Tour I - New Previous year Question Papers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Business Studies Planning Important Questions And Answers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Business Studies Business Environment Important Questions And Answers Study Material - QB365 Set A
NEW12th Standard CBSE
CBSE 12th Business Studies Principles of Management Important Questions And Answers Study Material - QB365 Set A
NCERT Books
Syllabus
Exam Pattern
Sample Question Papers
Previous year Question Papers
Important Notes
MCQ Practice test
NCERT Exemplers
Case study Questions
Image Based Questions
Passage based Questions
HOT Questions
Value Based Questions
Model Questions Papers
NCERT ( Book Back ) Questions
Assertion and Reason
Important Questions And Answers
CBSE 12th Standard CBSE Subjects
CBSE Standards
