21. Primary phloem develops from
22. Other than spreading malaria, anopheles mosquitoes are also vectors of
23. Plants that grow in saline water are called
24. Pyorrhoea is a disease of the
25. O2 released in the process of photosynthesis comes from
26. Placenta is the structure formed
27. Plants hormone that induces cell division is
28. Neurospora is used as genetic material because
29. Phloem is a tissue found in
30. N2 content is kept constant in the biosphere due to
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