Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
In Bougainvillea thorns are the modifications of
In Bougainvillea, thorns are the modifications of stem. They are stiff, sharp structures, which have lost their growing point and become hard. They reduce transpiration as well as browsing by animals.
Perigynous flowers are found in
Perigynous flowers are found in rose.
Flowers can be categorised based on the position of the ovary in relation to the other parts of the flowers. When the floral plants arise from a position below the ovary, the flower is said to be hypogynous (hypo=below; gynous=flower) and the ovary is superior, e.g. China rose.
When the floral parts arise from a position above the ovary , the flower is epigynous (epi=above) and ovary is inferior, e.g. cucumbar and guava.
There is another special case of an inferior ovary where the bottom of sepals, petals and stamens are fused into a cup around the ovary called hypanthium (floral cup). Such, flower is termed as perigynous (peri = around), e.g. rose.
An example of axile placentation is
Lemon (Citrus sp.) belongs to family-Rutaceae, contains axile placentation.
Argemone belongs to family-Papaveraceae, contains parietal placentation. Dianthus belongs to family-Caryophyllaceae, contains free-central placentation. Marigold belongs to family-Asteraceae, contains: basal placentation.
A fruit developed from hypanthodium inflorescence is called
Syconus fruit develops from hypanthodium inflorescence, eg Ficus carica, F. religiosa, F. benghalensis. The flask shaped receptacle encloses female flowers that gives rise to achene-like fruitlets. This fruit possesses a small pore protected by scaly leaves. The receptacle that becomes fleshy is edible.
An example of a seed with endosperm, perisperm and caruncle is
The seeds of castor (Ricinus communis, family -Euphorbiaceae) are endospermic dicot seeds. They possess, endosperm which acts as the food storage tissue of seed. They also possess perisperm and cruncle.
Lady finger belongs to the family
Lady's finger or Okra or Abelmoschus esculentus belongs to the family malvaceae. The plant is native of tropical Africa. The fruits are light green, mucilaginous and contain numerous green or brown seeds.
Velamen is a specialized tissue found in
Velamen is a dead spongy tissue present in epiphytic roots (hygroscopic roots). With the help of velamen, these roots are able to absorb water from moist atmosphere, dew and rain.
Coconut's husk fibre, coir of commerce is extracted from
Commercial coir is obtained from the fibrous husk (mesocarp) of fruits of coconut palm. The fibre is valued for its lightness and exceedingly high resistance to mechanical wear and dampness.
Cocoa is the plant from which chocolate is made. Which part is used to extract it?
Cocoa or Theobroma belongs to family sterculiaceae, and is a native of tropical America for preparation of cocoa and chocolates, the seeds are used.
The small projections present on the surface of pineapple fruit represent
The small projections present on the surface of pineapple fruit represent persistent bracts. Pineapple is a sorosis fruit. It is a multiple fruit developed from a spike female catkin, spadix inflorescence.
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