1. Our major foods, fibres, spices, fruits and beverage crops are

2. Man belongs to the phylum

3. Lungs are situated in the

4. O2 released in the process of photosynthesis comes from

5. Spinal cord is a long narrow and almost cylindrical structure that extends from the brain to the

6. A person of which of the following blood groups is called a universal donor?

7. Consider the following statements:
1. When a nerve fibre is stimulated, a profound change is produced in the electrical properties of surface membrane and in steady potential.
2. Upon excitation, the resting potentialis suddenly changed.
3. It is due to sudden and several hundred -fold increase in permeability to Na+ ions.
4. With Na+ ions moving inside the point of stimulation, the positive charge inside the nerve cell increases and reaches a peak called “action potential”.
Which of the following statement are correct?

8. Consider the following statements:
1. Normal diet should contain 75gm of fat.
2. Fatty acids should be a part of human diet.
3. The cells of the human body cannot synthesise any fatty acids.
4. Deficiency diseases develop due to the absence of unsaturated fatty acids called essential fatty acids.
Which of the above statements are correct?

9. A cockroach has

10. Blood haemoglobin has high affinity for

11. Endospermic seeds are found in

12. The type of relationship in which one organism is benefited while there is no effect on other is

13. Just as the division of cytoplasm is called cytokinesis, the division of nucleus is called

14. Neurospora is used as genetic material because

15. Broad spectrum antibiotics are one which attack

16. The largest of the living birds is

17. Scarification of seeds is done for removing

18. Following replacement of breast feeding by less nutritive food, low in proteins and calories, infants below the age of one year suffer from:

19. Lichen is considered to be a symbiotic association of two living organisms. Which organisms are involved in it?

20. Impulses from the pace -maker cause the

21. A high surface area to volume ratio in cells is important because it

22. Phloem is a tissue found in

23. DNA replication means

24. The exchange of gases in mammals takes place in the

25. The segment of a myofibril that is called a sarcomere runs from