What is Aestivation explain with examples?

Asked By: Joussef Matela | Last Updated: 18th January, 2020
Category: family and relationships pregnancy
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Aestivation means arrangement of accessory floral organs(sepals or petals) in relation to one another in a flower. Some types of Aestivation: -Open: Margins of adjacent petals are not overlapping / touching others. -Valvate: Margins of the adjacent petals touch each other but without overlapping ex: Brassica.

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Correspondingly, what is Aestivation example?

Non-mammalian animals that aestivate include North American desert tortoises, crocodiles, and salamanders. Some amphibians (e.g. the cane toad and greater siren) aestivate during the hot dry season by moving underground where it is cooler and more humid.

Also Know, how many types of Aestivation are there? Imbricate Of the remaining sepals or petals, one margin is overlapping and the other margin overlapped. There are two types of imbricate aestivation descendingly imbricate and ascendingly imbricate.

Similarly, it is asked, what do you mean by Aestivation?

Aestivation or estivation, refers to the positional arrangement of the parts of a flower within a flower bud before it has opened. Aestivation is also sometimes referred to as praefoliation or prefoliation, but these terms may also mean vernation: the arrangement of leaves within a vegetative bud.

What are the two types of Aestivation?

Classes of aestivation include:

  • imbricate – overlapping.
  • crumpled.
  • decussate.
  • induplicate – folded inwards.
  • open – petals or sepals do not overlap or even touch each other.
  • reduplicate – folded outwards.
  • valvate – margins of adjacent petals or sepals touch each other without overlapping.

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What is Aestivation in biology?

(plural aestivations) (biology) A state of inactivity and metabolic depression during summer: the summer version of hibernation. (botany) The arrangement (vernation) of the parts of a flower inside a bud; prefloration.

What is Aestivation and types?

Aestivation means arrangement of accessory floral organs(sepals or petals) in relation to one another in a flower. Some types of Aestivation: -Open: Margins of adjacent petals are not overlapping / touching others. -Imbricate: Irregular overlapping of petals by one another. ex: cassia.

What is Placentation and types?

Types of Placentation : Axile,Marginal, Parietal, Basal, Superficial Placentation. In Angiosperms, ovules are present inside the ovary. Placenta is a special type of tissue, which connects the ovules to the ovary. The mode of distribution of placenta inside the ovary is known as placentation.

What is Epipetalous?

Epipetalous are those flowers in which the androecium anther is attached with the petals of the flower bt since in some plants like lily sepals and petals are the same which are called perianth and when anther is attached to perianth it called epiphyllous.

What is Polypetalous?

polypetalous Describing a flower in which the corolla consists of separate petals. Compare gamopetalous.

What is Placentation in biology?

In biology, placentation refers to the formation, type and structure, or arrangement of the placenta. The function of placentation is to transfer nutrients, respiratory gases, and water from maternal tissue to a growing embryo, and in some instances to remove waste from the embryo.

What is perianth in botany?

The perianth (perigonium, perigon or perigone) is the non-reproductive part of the flower, and structure that forms an envelope surrounding the sexual organs, consisting of the calyx (sepals) and the corolla (petals).

What is marginal Placentation?

1. marginal placentation - with ovules borne on the wall along the ventral suture of a simple ovary. ventral placentation. placentation - arrangement of the ovules in the placenta and of the placentas in the ovary. Based on WordNet 3.0, Farlex clipart collection.

What is an example of Estivation?

Estivation is one form of dormancy that some animals use to conserve energy under extreme hot and dry conditions. Animals that estivate include lungfish (which estivate for up to three years), earthworms, hedgehogs, snakes, crocodiles, snails, and desert tortoises.

What is difference between hibernation and Aestivation?

Aestivation and hibernation are the types of sleeping pattern. The main difference between aestivation and hibernation is, aestivation is summer sleep while hibernation is winter sleep in which an organism passes the winter period in dormant condition.

What is summer sleep called?

Summer sleep in animals is called aestivation from the Latin aestas, meaning summer. Its a state of dormancy, like hibernation, that is characterized by a low metabolic rate, and inactivity.

What is the meaning of hibernating animals?

hibernate. To hibernate means to take a season-long snooze. Animals that sleep through the winter, like bears, squirrels, rodents and even some rattlesnakes, are said to hibernate through the winter. This word can also be used to describe any kind of inactive or dormant state, especially for the purpose of getting rest

What is Vexillary Aestivation?

Vexillary aestivation is the special arrangement where one large petal covers the other smaller petals. The two innermost, boat-shaped petals are called keels in this aestivation. The plants of Papilionaceae or legume family exhibit the ideal examples of vexillary aestivation.

What is plant Aestivation?

Aestivation: Aestivation is the arrangement of either the sepals or the petals in a flower bud with relation to one another as vernation proper is the arrangement of young leaves in the vegetative bud. Aestivation is of considerable importance in the classification of plants.

What's the point of hibernation?

Hibernation is a deep sleep that helps them to save energy and survive the winter without eating much. During hibernation the animal's body temperature drops, and its heartbeat and its breathing slow down so that it does not use much energy.

Do polar bears Aestivate?

Polar bears probably do not hibernate in a way they do. They just enter into a specialized winter dormancy. This is little different from natural hibernation. During winter dormancy polar bears can also reduce their heart rate and possibly metabolism and temperature.

What is Hypogynous flower?

In hypogynous flowers, the perianth and stamens are attached to the receptacle below the gynoecium; the ovary is superior to these organs, and the remaining floral organs arise from below the point of origin of the carpel. …the pistil; such flowers are hypogynous (e.g., buttercup and magnolia).