Question
Where is apical meristem found?
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$^1_1\text{H},\ ^2_1\text{H},\ ^3_1\text{H}$
Explain why:The atomic number of calcium and argon are 20 and 18 respectively, but the mass number of both these elements is 40. What is the name given to such a pair of elements?
Define connective tissue.
How does oxygen and carbon dioxide remain nearly constant in the atmosphere?