Morphology of flowering - 12-07-23

he stem develops from –

• Hypocotyl

• Epicotyl

• Radicle

• Plumule

Stem tendrils (climbing in function) develop from axillary bud. Stem tendrils are in all of the following except –

• Cucumber

• Citrus

• Pumpkin

• Watermelon and gravevines

Thorn of Citrus and Bougainvillea is modified –

• Stem

• Root

• Leaf

• Inflorescence

Thorn develops from –

• Root

• Leaf

• Axillary bud

• Peduncle

Some plants of arid regions modify their stems into flattened (Opuntia), or fleshy cylindrical (Euphorbia) green structures called –

• Phyllode

• Rhizome

• Phylloclade

• Cladode

In Banana, Pineapple and Chrysanthemum, the lateral branches originate from the basal and underground portion of mainstem and then come obliquely upward giving rise to leafy shoots. These branches are called –

• Runner

• Sucker

• Napiform

• Phylloclade

Offset is one internode long runner and its each node bears rosette of leaves and a tuft of roots. It is found in aquatic plants like –

• Hydrilla

• Pistia

• Eichhornia

• Both b and c

In plants like Jasmine and Mint, a slender lateral branch arises from the base of main axis and after growing aerially for some time arch downwards to touch the ground and forms new plant. Such lateral branches are called –

• Offset

• Sucker

• Stolon

• Scramblers

In which of the following plants, underground stems spread to new niches and when older parts die new plants are formed –

• Pistia

• Grasses and strawberry

• Crocus

• None of these

Leaves –

• originate from shoot apical meristem

• Are arranged in an acropetal order

• Are the most important vegetative organs for photosynthesis

• All