CBSE Class 12 Biology all chapters revision worksheets (1)

Scroll down for PDF

CBSE Class 12 Biology all chapters revision worksheets (1). CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.

1. Name the asexual reproductive structure in
a) Penicillium
b) Sponge
2. In diploid organisms, the gamete mother cells are called ____________ 
3. Coconut water in tender coconut is actually ___________________ (endosperm / early cotyledon / fruit)
4. What are vegetative propagules? Name any one.
5. Mention the function of filiform apparatus. 
6. Cleistogamous flowers produce assured seed set even in absence of pollinators. How? 
7. Write difference between menstrual cycle and Oestrus cycle. 
8. Match the following:
a) Homothallic 
i) Dioecious
b) Heterothallic
ii) Monoecious
9. In Chara, the female sex organ is _______________ and the male sex organ is ____________ . 
10. a) Why are off-springs of oviparous animals at greater risk than off-springs of viviparous animals?
b) What is common between Turkey (bird) and honey bee which is unusual in sexually reproducing animals.
11. a) Pollen grains are tolerant to strong acids and high temperatures. What made it so?
b) Which area in the coat of the pollen grain this tolerance is absent?
12. How is Geitonogamy different from autogamy and Xenogamy? 
13. Discuss on the devices which plants have developed to encourage cross pollination. (any two) 
14. Draw the structure of an anatropous ovule and label 6 parts. 
15. a) Enlist the characteristics of flower favouring wind pollination.
b) Name two plants pollinated by wind.
16. Write the steps you would follow to artificially hybridize your crop plants. 
17. What happens to the following after fertilization:
Egg, Polar nuclei, Antipodal cells, Synergids, ovule, ovary 
18. a) Explain the development of microspores in angiosperms.
b) Are microspores the male gametes? Justify?
19. Explain the following terms:
a) Polyembryony
b) Scutellum
c) Perisperm
d) Apomixis
e) Triple fusion

Please click the link below to download full pdf file for CBSE Class 12 Biology all chapters revision worksheets (1).


Click on the text For more study material for Biology please click here - Biology

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

CBSE Board Introduces Experiential Learning for Student

CBSE Academic Session 2019-20: Board Introduces Experiential Learning for Student: The education sector has grown for some new changes. As per the latest updates the Central Board of Secondary Education has been good in making all the possible efforts to improve...


Central Board of Secondary Education, CBSE is to conduct the 10th and 12th Board Examination 2020 from February 15, 2020. Due to University Admissions, CBSE has shifted Board Exams dates from 1 March to February 15 from 2019. This year too CBSE would be making changes...

Registration of NEET 2020 starts

The NEET 2020 registration process would start on Monday, December 2nd, 2019. National Testing Agency, NTA would carry out the county’s undergraduate entrance exam for medical and dental admissions.  The examination is scheduled to take place in English, Hindi, and...

Guidelines On Reducing Weight Of School Bags

GUIDELINES ON REDUCING WEIGHT OF SCHOOL BAGS In this competitive world, where students are giving their best, an unnoticed threat rides on our back. Heavy School Bags are a serious yet unresolved threat to the health and wellbeing of the young ones. The medium of their...

Seven Motivational tips for every student

If you’re are a student or a learner and you doesn’t feel like study then this article is going to be very important for you, Reading constantly and Staying motivated as a student is one of the most challenging tasks and barriers to educational success. Education is...

CBSE to conduct a voluntary test for class 11th and 12th

Nowadays students have the liberty to choose the field they seem to fit in. A few years back the problem was parents who burdened children with their own choices. On the other side, now students along with their parent's support are free to choose their field. Not any...

Studies Today