Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Plant Growth and Development

Long Answer Type

81. The role of enthylene is both positive and negative. Justify the statement.

193 Views

82.

Explain different phases of growth.

239 Views

Short Answer Type

83. Sometimes the fruits fall even before they are ripe. Give reasons.

132 Views

84. How are plant hormones used to suppress weeds ?

Synthetic auxins are used to get rid of dicot, such as Dandlions and thistles in areas reserved for monocots such as grain fields. A dicot responds to unnaturally high concentrations of auxins by growing rapidly and then die; whereas monocot, remains unaffected by the treatment.

140 Views