HORTICULTURE SCIENCE
PLANT BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
bract
|
|
|
bud scale
|
|
|
leaf scale
|
|
|
tendril
|
Detailed explanation-1: -Bud scales are modified leaves that enclose meristem tissue and protect it from injury and desiccation during winter months.
Detailed explanation-2: -Spines. Spines are modified leaves used for protection against herbivores. They have also evolved as a water-saving strategy in some plants.
Detailed explanation-3: -Epidermis – transparent, physical defence layer that does not contain chloroplasts. It allows light into the leaf. Palisade mesophyll layer – regularly shaped allowing many to pack together closely at the top of the leaf.
Detailed explanation-4: -The leaves get modified into thread-like structures called tendrils. These tendrils climb a nearby stick or wall and provide support to the plant. For eg., In Lathyrus aphaca, the whole leaf is modified into tendrils. The upper leaflets of Pisum sativum get modified into tendrils.