Advertisements
Advertisements
प्रश्न
A non biology person is quite shocked to know that apple is a false fruit, mango is a true fruit and banana is a seedless fruit. As a biology student how would you satisfy this person?
Advertisements
उत्तर
Fruits that are mature ovaries of flowers are called “true fruits”, and fruits that develop from other floral parts of plants are called “false fruits”. For example, in an apple, the thalamus produces the fleshy edible part; thus, an apple is a false fruit. Mango, on the other hand, develops from the ovary of the flower; thus, it is a true fruit.
Fruits that develop without fertilisation are called parthenocarpic fruits. Since no fertilisation takes place, such fruits are seedless. Banana is an example of a seedless fruit.
संबंधित प्रश्न
Draw a labelled mature stage of a dicotyledonous embryo.
Why does endosperm development preceeds that of zygote ?
Describe the development of an endosperm in a viable seed. Why does endosperm development precedes embryo development?
Why does endosperm development precede embryo development in angiosperm seeds?
______ is the first cell of female gametophytic generation in angiosperms.
Identify the ploidy of embryo and endosperm respectively formed after following cross.
An angiospermic male plant with 24 chromosomes in its pollen mother cells is crossed with female plant bearing 24 chromosomes in its root cells.
Identify the characteristic feature/s of helobial endosperm.
Identify the CORRECT statement/s from the following.
i. In post-fertilization changes within the ovule, the development of embryo is followed by the development of endosperm.
ii. Helobial endosperm is intermediate between cellular and nuclear type endosperm.
iii. Helobial endosperm is mostly observed in 72 families of dicots.
Which of the following triggers an acrosomal reaction of the sperm?
A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be ______.
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be ______.
Double fertilization leading to initiation of endosperm in angiosperms require ______.
The cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes?
The type of evolution where the central part is occupied by free nuclear and the peripheral part by cells is observed in ______.
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are ______.
Which of the following plants develops cellular type endosperm?
What is the developmental fate of the chalazal chamber in helobial type endosperm?
During the post-fertilisation development inside the ovule, how do the embryo and endosperm develop relative to each other?
