Test: Morphology Of Flowering Plants 4 - From Past 28 Years Questions - NEET MCQ

Legume is a dehiscent dry fruit produced from a monocarpellary superior ovary. Caryopsis is dry and one seeded fruit which developed from a superior monocarpellary ovary. In this the pericarp is closed and fused with seed coat. It is a characteristics of family Poaceae.

Micropyle of seed is involved in the passage of water. Micropyle plays an very important role in absorbing water during the time of germination.

Normally endosperm formation is accompanied by degeneration of nucellus. Persistent nucellus is termed as perisperm.
The dust-like seeds of orchids have no endosperm. Orchid seedlings are mycoheterotrophic in their early development. In some other species, such as coffee, the endosperm also does not develop. Instead the nucellus produces a nutritive tissue termed perisperm.

Mesocarp is the edible part of Mangifera indica (Mango).

Tomato and Tobacco both belong to the family Solanaceae. Solanaceae has some identifying characteristicsbicarpellary syncarpous superior ovary, axile plancentation, fruit is berry or capsule.

Each pseudostem produces a single bunch of bananas, before dying and being replaced by a new pseudostem. The base of the plant is a rhizome (known as a corm). Corms are perennial, with a productive lifespan of 15 years or more . Cultivated bananas are parthenocarpic, which makes them sterile and unable to produce viable seeds. Lacking seeds, another form of propagation is required. This involves removing and transplanting part of the underground stem (called a corm). Usually this is done by carefully removing a sucker with some roots intact.

Groundnut is economically important plant as edible oil is obtained from the cotyledons. Peanuts are a rich source of protein (roughly 30 grams per cup after roasting) and Monounsaturated fat. Recent research on peanuts and nuts in general has found anti-oxidants and other chemicals that may provide health benefits. Peanuts are a significant source of resveratrol, a chemical studied for potential anti-aging effects.

In seeds developing from bitegmic ovules the seed coat has two layers outer testa and inner tegmen. Testa develops from outer integument whereas tegmen develops from inner integument.

Special type of seed germination is characteristic of halophytes growing in saline conditions is vivipary. The seed germination occurs inside the fruit while it is attached to the parent plant.

Asteraceae possesses head or capitulum inflorescence which is racemose and is surrounded by an involucre of bracts.

Aerial roots of orchids hang freely in the air and absorb moisture with the help of special sponge like tissue called velamen.

Agave species are popular ornamental plants. Each rosette is monocarpic and grows slowly to flower only once. During flowering a tall stem or “mast” grows from the center of the leaf rosette and bears a large number of shortly tubular flowers. After development of fruit the original plant dies, but suckers are frequently produced from the base of the stem which become new plants. It is a common misconception that Agaves are a cactus. 

Syngenesious condition is found in asteraceae. It is the condition when stamens are united by their anthers (filaments free). Epipetalous condition is also seen here.

Drupe is a fleshy one seeded, indehiscent fruit eg. Mangifera indica.

Fabaceae.

Cauliflower has the scientific name Brassica oleracea belonging to the variety botrytis.

Vivipary germination is the characteristic mode of seed germination in Rhizophora (Mangrove).

Asteraceae possess five stamens with free filaments but anthers united forming a tube around the style (syngenesious).

Pulses which are economically important belong to the family Fabaceae.

Perennials survive for more than two years and produce flowers and fruits during specific seasons.

Dicotyledoneae is the group of angiosperm with two cotyledons, flower bi or pentamerous, leaves net-viened, stern with Open collateral vascular bundle arranged in a ring and roots form tap root system.

Hypanthodium is a special kind of inflorescence where the receptacle is usually fleshy and flash-shaped. e.g. Ficus.

Buttress roots are asymmetrically thickened prop roots found at the base of certain trees. They render additional mechanical support to the trees. e.g. Salmalia, Terminalia etc.

Tetradynamous stamens consist of four long-sized stamens and two shortsized stamens. Such kind of stamens are found in family Cruciferae e.g. Sarsoo. Tetradynamous condition is characteristic of this family.