The smallest size of a cell which can be seen directly by the eye is

A. One micron

B. 10 micron

C. 100 micron

D. 1000 micron

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  3. Eye is an organ that can be called as
  4. Appearance of offspring resembling their remote ancestor is called
  5. Ecology of a population is known as
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  20. The layer of stagnant water in which light penetrates is called
  21. Which one is called anti-haemorrhagic vitamin?
  22. Chlorosis is the phenomenon where leaves have
  23. The plant that is dispersed with the help of water is
  24. Compared to the veins, the walls of arteries are
  25. It Is not advisable to sleep under a tree at night because of release of
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