The smallest blood vessels which are one-cell thick, are called ______
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What is the function of guard cells of stomata?
Which drug is used as an Anti-Inflammatory?
The female sex organs in a flower is the __________.
Which of the following induces nitrogen fixation in soil?
Which of the following bacterium causes crown gall disease in plants?
Which of the following glands is a source of the enzyme Ptyalin?
Which of the following animals do NOT belong to the class of reptiles?