Identify the part of the seed from the given figure which is destined to form root when the seed germinates. [2024]
[IMAGE 11]
A
B
C
D
(3)
In given figure of monocotyledonous seed, A, B, C, and D are coleoptile, plumule, radicle and coleorhiza, respectively. In majority of these plants, the direct elongation of the radicle (C) leads to the formation of root which grows inside the soil.
Which part of the fruit, labelled in the given figure makes it a false fruit? [2022]
[IMAGE 12]
A → Mesocarp
B → Endocarp
C → Thalamus
D → Seed
(3)
In some plants like apple, strawberry the thalamus (C) contributes in the formation of false fruits.
Persistent nucellus in the seed is known as [2019]
tegmen
chalaza
perisperm
hilum
(3)
In some seeds, remains of nucellus persist. This residual nucellus which persists in the seed is called perisperm, e.g., black pepper, coffee, castor, cardamum, Nymphaea.
Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? [2019]
Ovules develop into embryo sac.
Ovary develops into fruit.
Zygote develops into embryo.
Central cell develops into endosperm.
(1)
Ovules develop into seeds.
The coconut water from tender coconut represents [2016]
free nuclear proembryo
free nuclear endosperm
endocarp
fleshy mesocarp
(2)
Coconut has multicellular endosperm (called coconut meal) in the outer part and free nuclear as well as vacuolate endosperm (called coconut milk or coconut water) in the centre.
Coconut water from a tender coconut is [2015]
innermost layers of the seed coat
degenerated nucellus
immature embryo
free nuclear endosperm
(4)
Coconut has multicellular endosperm (called coconut meal) in the outer part and free nuclear as well as vacuolate endosperm (called coconut milk or coconut water) in the centre.
Which one of the following fruits is parthenocarpic? [2015]
Jackfruit
Banana
Brinjal
Apple
(2)
Parthenocarpic fruits are the fruits which are formed without fertilisation. These fruits are naturally seedless, e.g., banana.
Non-albuminous seed is produced in [2014]
maize
castor
wheat
pea
(4)
In majority of dicot seeds, including pea, the endosperm is consumed during seed development and the food is stored in cotyledons and other regions. They are called non-endospermic or exalbuminous seeds.
