Short Answer TypeRecombination DNA technology is of great importance in the field of medicine. With the help of a flow chart, show how this technology has been used in preparing genetically engineered human insulin.
Following the collision of two trains a large number of passengers are killed. A majority of them are beyond recognition. Authorities want to hand over the dead to their relatives. Name a modern scientific method and write the procedure that would help in the identification of kinship.
Many plant and animal species are on the verge of their extinction because of loss of forest land by indiscriminate use by the humans. As a biology student what method would you suggest along with its advantages that can protect such threatened species from getting extinct?
Since October 02, 2014 'Swachh Bharat Abhiyan' has been launched in our country.
(a) Write your views on this initiative giving justification.
(b) As a biologist name two problems that you may face while implementing the programme in your locality.
(c) Suggest two remedial methods to overcome these problems.
(a) 'Swachh Bharat Abhiyan' is an initiative started by India's Prime Minister, Narendra Modi on October 02, 2014. It is India's biggest cleanliness drive since independence. On a personal note, I am completely in support for the movement. It is our primary duty to clean our nation because wastes and garbage are the biggest problems that play havoc on the progress and the development of a country. An unclean surrounding leads to lots of problems like health issues and may cause diseases. On a large scale, it is responsible for the pollution, be it air and water, which creates problem both on development and economic aspects of the country.
(b) As a biologist, two problems might be faced while implementing the programme in my locality are as follows:
i. Problem of proper sanitation and disposal.
ii. Separation of biodegradable and non-biodegradable wastes.
(c) Two suggested remedial methods are:
1. To overcome sanitation problems, we should provide awareness regarding the advantages of proper sanitation and encourage people of the locality to make proper toilets and dispose their garbage in dustbins or garbage bags and not throw them on the road.
2. There should be separate bins for both biodegradable and non-biodegradable wastes so that the non-biodegradable waste like plastic items can be used and recycled accordingly.
b
Long Answer TypeA flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons:
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
During the reproductive cycle of a human female, when, where and how does a placenta develop? What is the function of placenta during pregnancy and embryo development?
How did Hershey and Chase established that DNA is transferred from virus to bacteria?
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