CBSE Class 12 Biology HOTs All Chapters Set B

CBSE Class 12 Biology HOTs all chapters. Higher Order Thinking Skills (HOTS) download and print

 Higher Order Thinking Skills

Chapter Name of the Chapter:

No. 1 Reproduction in organisms.

 Q 1 Rahul observed green coloured long algal filaments in a stagnant pond, which are single layer aggregation of vertically arranged cells. What sort of strategy can this type of cellular aggregation adopt for multiplication?

 Answer: Fragmentation (vegetative method).

 Q 2 Both the prefixes ( Uni- and Mono- ) have the same meaning i.e. one in number. Does it mean that uni-sexual and mono-ecious species are the same?

 Answer: Unisexual is used in reference to the flower (presence of either anther or carpel). Monoecious is used in reference to the plant (morphologically one plant bearing both the sexes in their flowers.

Check out this link also - 
class 12 biology solutions.

 Q 3 In  oogamy, female gamete is large and non-motile but the male gamete is reverse in its properties. Why such type of adjustment is there in higher organisms?

 Answer:In  oogamy, female gamete being larger and non motile, is an adaptation for having more food reserves that may be required for the future development. The male gamete has to move to reach the counterpart, so it has the machinery for its reaching and delivering the chromosomes. A lot of cytoplasm will means extra weight also. So both the sex cells have specialized themselves for their functions.

 Q4 Name organisms that reproduce to produce genetically similar individuals. What is the type of  eproduction do they follow? Why are the individuals so similar?

 Answer: Unicellular organisms. Asexual reproduction. Because they are morphologically and Genetically identical.

 Q5 How do gemmules and gemma cup differ from each other?

 Answer:  Gemmules are the internal buds found in coelenterates and sponges. Gemmae are the external buds found in bryophytes.

 Please refer to link below to download pdf file of CBSE Class 12 Biology HOTs all chapters.

Tags: 

 


Click to View or Download pdf file
Click for more Biology Study Material

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

Checking of Boards Answer sheets starts today

CBSE has instructed almost 3000 schools to start the evaluation work for class 10th and class 12th board exam answer sheets from today. The checking of answer sheets for class 10th and class 12th was stopped earlier due to covid crisis in the country. Now in order to...

Board Exams helpline by CBSE

According to the recent announcement of CBSE, the pending Class 10 and 12 Board exams are going to be held from 01 July to 15 July 2020 in India. Along with this, it has also been decided to resume the free of cost tele-counseling service for students from 9.30 am to 5...

CBSE Online Training for Teachers 2020

It is clear that this pandemic has utterly disrupted an education system that many assert was already losing its relevance. Enhancing professional development digitally is a need in the times of COVID-19, where social distancing and remote interactions is the new...

Board Exams Class 10 and 12 Notification by CBSE

Because of the prevailing condition of spread of COVID-19 pandemic in the country, special efforts are required for conducting examinations in a safe manner. As a number of students have shifted from the district of their school to some other district in the country,...

TV Channels for Students by CBSE

In enhancing the students studying part, the Government is planning to introduce one standard one channel plan. The lockdown in India has adversely collapsed all the operations including schools, colleges, and workplaces with unanticipated setbacks. On behalf of the...

×
Studies Today