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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?
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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
Describe the development of endosperm after double fertilisation in an angiosperm.
Draw a labelled mature stage of a dicotyledonous embryo.
Why does endosperm development preceeds that of zygote ?
In which of the following the primary endosperm nucleus undergoes free nuclear division or karyokinesis?
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?
At what stage of endosperm development, will you observe nuclear or cellular type of endosperm?
Ex-albuminous seeds differ from albuminous seeds in ____________.
In dicots, the pollen grains are usually ______
A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be ______.
In angiosperms, triple fusion is required for the formation of ______.
Double fertilization leading to initiation of endosperm in angiosperms require ______.
If the endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in the root tip cells will be ______.
Mark the odd one.
The diagram given below shows the three types of endosperms in angiosperms.
 |
 |
 |
| Type 1 | Type 2 | Type 3 |
- Identify the three types of endosperms shown above.
- Name the type of endosperm which commonly occurs in polypetalous dicots.
The number of chromosomes in the leaf cells of a male plant is 40 and in the stem cells of a female plant is 60. If they are artificially hybridised, what will be the number of chromosomes in the endosperm?
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are ______.
