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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.
Which of the following is the largest root parasite?
Rafflesia is the largest root parasite, known as the 'corpse flower' due to its foul odor. It lacks leaves, stems, and roots, and obtains nutrients from the host plant's roots.
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.
Pappus helps in dispersal of pollen in
Pappus is the hairy structure which is a modification of calyx in family–Asteraceae (Compositae).
Thorn of Citrus and Bougainvillea is modified:
Axillary buds of stems may also get modified into woody, straight and pointed thorns. Thorns are found in many plants such as Citrus, Bougainvillea. They protect plants from browsing animals.
(page-68)
Leaves are modified into tendrils in:
Leaves are often modified to perform functions other than photosynthesis. They are converted into tendrils for climbing as in peas or into spines for defence as in cactus.
(page-71)
In marginal placentation, the ovules are arranged:
In marginal placentation the placenta forms a ridge along the ventral suture of the ovary and the ovules are borne on this ridge forming two rows, as in pea.
(page-75)
The seed coat has 2 layers, the outer _____________ and inner _____________. The _____________ is a scar on the seed coat through which the developing seeds are attached to the fruit. Above the ____________ is a small pore called the __________:
The outermost covering of a seed is the seed coat. The seed coat has two layers, the outer testa and the inner tegmen. The hilum is a scar on the seed coat through which the developing seeds were attached to the fruit. Above the hilum is a small pore called the micropyle.
(page-76)
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.