Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
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)
In castor, the food storing tissue is:
In some seeds such as castor the endosperm formed as a result of double fertilisation, is a food storing tissue.
(page-77)
Scutellum is the first leaf of:
The embryo is small and situated in a groove at one end of the endosperm. It consists of one large and shield shaped cotyledon known as scutellum. Scutellum is the first leaf of monocot.
(page-77)
Find out the False statement from below ones:
I. Calyx and corolla are reproductive organs of a flower.
II. Zygomorphic flower can be divided into two equal radial halves in any radial plane.
III. Flowers without bracts are termed as bracteate.
IV. Parthenocarpic fruit is formed after fertilization of the ovary.
V. In legumes seed is non-endospermic.
VI. Ovary is inferior in Fabaceae.
VII. A fertile stamen is called staminode.
VIII. Radical buds develop on roots.
Correction:-
Trimerous flowers, superior ovary axile placentation is characteristic of:
Inflorescence: solitary / cymose; often umbellate clusters
Flower: bisexual; actinomorphic
Perianth tepal six (3+3), often united into tube; valvate aestivation Androcium: stamen six, (3+3)
Gynoecium: tricarpellary, syncarpous, ovary superior, trilocular with many ovules; axile placentation
Fruit: capsule, rarely berry
Seed: endospermous
(page-81)
Which of the following represents the floral characters of Liliaceae?
It is commonly called the ‘Lily family’ is a characteristic representative of monocotyledonous plants. It is distributed world wide.
Inflorescence: solitary / cymose; often umbellate clusters
Flower: bisexual; actinomorphic
Perianth tepal six (3+3), often united into tube; valvate aestivation Androcium: stamen six, (3+3)
Gynoecium: tricarpellary, syncarpous, ovary superior, trilocular with many ovules; axile placentation
Fruit: capsule, rarely berry
Seed: endospermous
(page-81)
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