Question

What is aestivation ? type also with example.plzz

Answer 1

Aestivation is a state of animal dormancy, simular to hibernation charecterized by inactivity and a lowered metabolic rate ,that is entered in response to high tempearature and arid conditon. For example, amphibians,mammals

Answer 2

The arrangements of the accessory floral organs (sepals or petals included) in relation with another floral bud is called as aestivation. It is in general, of four types.

1) Open type: The margins present in the adjacent petals are sufficiently apart from each other (separated from each other). They are present normally in all the flowers where all the petals are "open" to the outside.

2) Valvate: Margins of the adjacent flowers or petals touch each other but with overlapping into them e.g., corolla of Brassica.

3) Twisted or Contorted: One margin of a petal is overlapping regularly with the margin of an adjacent petal; the other margin being overlapped by the margin of adjacent not her petal, e.g., corolla of China Rose.

4) Imbricate: There is a inconsistent or irregular overlapping of petals by one another. It has 3 sub-types besides the Imbricate proper: a) Quincuncial, b) Ascending Imbricate and c) Descending Imbricate.