NEET BIOLOGY

Detailed explanation-1: -In Bougainvillea, thorns are the modifications of stem in which axillary buds of stems get modified into woody, straight and pointed thorns. These thorns protect the plants from browsing animals.

Detailed explanation-2: -The stem is modified to perform various functions. One of the modifications of the stem is the development of thorns in the Bougainvillea which helps in providing support and nutrients to the various parts of the plants. Additional Information:-The plants are either bushes, trees, or vines with thorns.

Detailed explanation-3: -Assertion :Stems of some plants protect from browsing animals. Reason: Axillary buds of stems of these plants are modified into thorns.

Detailed explanation-4: -They are thorny, evergreen, and are popular for their large, colorful “blooms, ” which are produced most profusely in summer. Like the dogwood and the poinsettia, their colorful “petals” or “flowers” are really modified leaves called bracts that surround the true small white tubular flowers.

Detailed explanation-5: -Cucurbita tendrils and Bougainvillea thorns are both modified axillary buds, their functions are different from one another. The thorn serves as a defense against grazing animals. The tendrils aid in providing support when climbing. They are anatomically similar but vary in function.