Saturday, October 24, 2020

2018 March | HSE +2 Exam | Botany Question Paper

2018 MARCH

PART A: BOTANY


Questions 1 to 2: Answer all questions from 1 – 2. Each question carries 1 score. 

1. Select the disease resistant variety of Bhindi produced by mutation breeding.

(a) Himgiri
(b) Parbhani Kranti
(c) Pusa Gaurav 
(d) Pusa Komal

2. Under unfavourable conditions many zooplanktons species in lakes and Ponds are known to enter a stage of suspended development. Name that stage.

Questions 3 – 15: Answer any 11 questions from the following. Each question carries 2 scores.

3. Ozone acts as a shield for absorbing ultraviolet radiations from the Sun.
 
a. Name the region of atmosphere where Ozone is seen.
b. Write the unit used to measure ozone layer.

4. Match the following organisms to their life span. 

A

B

1. Butterfly

a. 140 years

2. Crow

b. 100 to 150 years

3. Parrot

c. 1-2 weeks

4. Tortoise

d. 15 years

 

e. 60 years


5. The DNA fragments can be separated using gel electrophoresis.

a. Name the gel used in this technique.
b. Write the name of technique used to remove the DNA from the gel.

6. Observe the following figure.


a. Identify the figure.
b. What does (i) tetR (ii) rop (iii) ori denote?

7. Synergids have a special cellular thickening at micropylar tip. Write the name of name and function of the structure.

8. Controlled breeding experiments can be carried out using artificial insemination. What are the advantages of this process?

9. Bio-fortification is a practical approach to improve the public health. Name any four such crops released by IARI.

10. The products of ecosystem processes are named as ecosystem services. list out any four such services.

11. In 1990s, Delhi ranked 4th among the most polluted cities of the world. What are the parallel steps taken to reduce vehicular pollution?

12. Increase in the level of greenhouse gases leads to global warming. How can it be controlled?

13. Genetically modified plants have been used in many ways. Give any four advantages of such plants.

14. In 1983, American company Eli Lilly produced human insulin artificially. Write down the method followed in this technique.

15. Pyramid of energy is never been inverted. Why?

Questions 16-18: Write any two from the following questions. Each question carries 3 scores.

16. Meloideqyne incognitia is a nematode parasite infects the root of tobacco plants. its infection can be prevented by biotechnological methods.

a. Name the strategy.
b. Explain the principle behind this strategy.

17. The following graph shows two types of pollution growth curves. 


a. Name the growth curves.
b. What does K stand for?

18. In angiosperms, female gametophyte is known as embryo sac. Explain its development.

👉  ANSWERS

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