Question

Write about aggregate fruits.

Answer 1

As the ovules develop into seeds, the ovary begins to ripen and the ovarian wall gets fleshy and makes a hard external covering to ensure the formation of the fruit. A fruit is therefore called a matured ovary. The fruit is the aged ovary of a plant containing the seeds.

Complete answer:
Majority of fruits evolve from a single pistil. A fruit that is developed from the apocarpous gynoecium i.eSeveral pistils of one flower may be called an aggregate fruit. A multiple fruit depicts the gynoecium of a lot of flowers. When accessory flower parts, such as the stem-axis or floral tube, are preserved or take part in fruit formation, as occurs in the apple or strawberry, it forms an accessory fruit.
Some plants, mostly cultivated types, spontaneously produce fruits in the absence of pollination and fertilization. This natural parthenocarpy develops to the formation of seedless fruits such as bananas, oranges, grapes, and cucumbers.
Classification systems for mature fruits look into the number of carpels present in the original ovary, dehiscence or opening or indehiscent, and dryness or freshness. The characters of the ripened ovarian wall, or pericarp, which may grow entirely or in pieces into fleshy, fibrous, or stony tissue, are essential. Often three different pericarp layers can be identified viz, the outer or exocarp, the middle or mesocarp, and the inner or endocarp. Actually, blackberries and raspberries are not true berries but aggregates of tiny drupes.
There are two major categories of fruits: fleshy fruits and dry fruits. Fleshy fruits are the fruits in which the pericarp and accessory parts grow into succulent tissues, as occur in brinjals, oranges, and strawberries; and dry fruits are the fruits in which the complete pericarp becomes dry at maturity. Fleshy fruits involve (i) the berries, like tomatoes, blueberries, and cherries; (ii) aggregate fruits, like blackberries and strawberries, and (iii) multiple fruits, like pineapples and mulberries, which grow from the mature ovaries of a complete inflorescence. Dry fruits involve the legumes, cereal grains, encapsulated fruits, and nuts.

Note:
A coconut is an example of drupe i.e., a stony-seeded fruit with a fibrous outer part. A walnut is also a drupe in which the pericarp has distinguished into a fleshy outer part and an inner hard “shell”. A peanut is an example of an indehiscent legume fruit. An almond is a drupe “stone”; i.e., the hardened endocarp generally has a single seed.