Question

modification of stem​

Answer 1

Explanation:

The stem of plants are modified because

• modification of stem for storing food in plants like potatoes.
• modification of stem for making food as in cactus plant because the leaves are changed into spines.
• modification of stem for giving support as creepes like gourd and grapevine cannot stand upright.

Answer 2

$\large\bf\underline\red{Modification\:of\:stem}$

• Underground stems of potato, ginger , turmeric etc. are modified to store food in them.
• Stem tendrils which develop from axillary buds are slender and spirally coiled and help plants to climb such as in gourds ( cucumber, pumpkins , watermelons) and grapevines.
• Axillary buds of stems may also get modified into woody , straight and pointed thorns. Thorns protect them from browsing animals. eg - Citrus
• Some plants modify their stems into flattened (Opuntia). They contain chlorophyll and carry out photosynthesis.

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