CBSE Class 12 Biology Worksheet Set I Solved

Read and download free pdf of CBSE Class 12 Biology Worksheet Set I Solved. Download printable Biology Class 12 Worksheets in pdf format, CBSE Class 12 Biology All Chapters Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Biology Class 12 Assignments and practice them daily to get better marks in tests and exams for Class 12. Free chapter wise worksheets with answers have been designed by Class 12 teachers as per latest examination pattern

All Chapters Biology Worksheet for Class 12

Class 12 Biology students should refer to the following printable worksheet in Pdf in Class 12. This test paper with questions and solutions for Class 12 Biology will be very useful for tests and exams and help you to score better marks

Class 12 Biology All Chapters Worksheet Pdf

1. Where does fertilisation occur in human reproduction? 
 
2. What is brood parasitism? 
 
3. What is parturition? How is it induced? 
 
4. How does temperature affect distribution of animals? Name two types based on their temperature tolerance.
 
5. Distinguish between the following:
(a) Hibernation and Aestivation (b) Ectotherms and Endotherms
 
6. Write down the chromosome pattern in human male and female. Who determines the sex of a child in human and how?
 
7. Define the following terms:
i] Allen's rule ii] competitive release iii] resource partitioning
 
8. Give reason
i] monarch butterfly survives from its predator
ii] Kangaroo rats can survive in the absence of an external source of water
iii] Small animals are rarely found in Polar Regions
 
9. What is age pyramid? Mention its types. State India belongs to which type of age pyramid. 
 
VALUE POINTS
 
1. Ampullary-Isthmus Junction 
 
2. One species lays eggs in the nest of another bird, lets the host incubate them.
E.g. Cuckoo lays eggs in the nest of a crow
 
3. processof delivery of the foetus/ foetal ejection reflex. 
 
4. Enzymes activity and therefore metabolic activities ,Eurythermal,stenothermal 
 
5. a) hibernation - winter sleep / Aestivation- summer sleep
b) ectotherms-COLD blooded endotherm- WARM blooded animals
 
6. human male - XY ; human female- XX Male
male produces two types of games i.e., X and Y / X carrying sperm fertilizes egg it is a female child/ Y carrying chromosome fertilizes egg cell it is male.
 
7. i]Allen’s rule states that those animals, e.g., mammals from colder climates generally have shorter ears and limbs to minimize heat loss."
ii]A species, whose distribution is restricted to a small geographical area because of the presence of a competitively superior species, is found to expand its distributional range dramatically when the competing species is experimentally removed"
iii]If two species compete for the same resource, they could avoid competition by choosing, for instance, different times for feeding or different foraging patterns. This is called resource partitioning"
 
8. i] The Monarch butterfly is highly distasteful to its predator (bird) because of a special chemical present in its body. Interestingly, the butterfly acquires this chemical during its caterpillar stage by feeding on a poisonous weed."
ii]Kangaroo rat is capable of meeting its entire water requirement through its internal fat oxidation in which water is a by -product. It has the ability to concentrate urine"
iii]Smaller animals tend to lose more body heat due to large surface area relative to their volume. Therefore, they have to spend more energy to generate body heat"
 
9. If the age distribution (per cent individuals of a given age or age group) is plotted for the population, the resulting structure is called an age pyramid expanding/stable/ declining expanding


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All Chapters CBSE Class 12 Biology Worksheet

The above practice worksheet for All Chapters has been designed as per the current syllabus for Class 12 Biology released by CBSE. Students studying in Class 12 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 12 Biology on a daily basis. All the latest practice worksheets with solutions have been developed for Biology by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 12 Biology students to get all the latest study material free of cost. Teachers of studiestoday have referred to the NCERT book for Class 12 Biology to develop the Biology Class 12 worksheet. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 12 Biology designed by our teachers. After solving these you should also refer to Class 12 Biology MCQ Test for the same chapter. We have also provided a lot of other Worksheets for Class 12 Biology which you can use to further make yourself better in Biology.

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