Wigs and hairs - seed appendages, Biology

Assignment Help:

Wigs and hairs - Seed Appendages

Seeds of certain plants have epidermal outgrowths or the integuments themselves may form folds and projections that present a wing-like appearance. In the tree Oroxylon sp. a thin, transparently white, circular or oval, disc-like wing spreads all around the two-lobed seed. The seed of cucurbit Zanonia macrocarpa has wings measuring up to 10 cm.

In the drumstick plant Moringa oleifera the seed has three equidistant wings. Seed wings provide large surface area, with optimum strength, combined with a minimum of material. A surprisingly large number of winged seeds can be arranged compactly in a fruit. Wings help the seed to propel, sail or spin some distance away when released from the fruit.

 


Related Discussions:- Wigs and hairs - seed appendages

Transported soils-types of soils, Transported Soils These soils are for...

Transported Soils These soils are formed from the weathered material which is transported and deposited away from the site of origin. Depending upon the nature of the transport

Explain various types of activities of a cell, The main arena of various ty...

The main arena of various types of activities of a cell is: 1. Plasma membrane 2. Mitochondrian 3. cytoplasm 4. Nucleus Cytoplasm

Ovipary, Ovipary, Vivipary and Ovovivipary In each case of external a...

Ovipary, Vivipary and Ovovivipary In each case of external and in some cases of internal fertilisation, development of the fertilized egg (zygote) occurs outside the mother's

Fungal Reproduction, Hi, I have this presentation about the kingdom of fung...

Hi, I have this presentation about the kingdom of fungi, and no website could clearly explain the two processes of fragmentation and sporulation. I mean what are their steps? And w

What are the constituent elements of the blood, Q What are the constituent ...

Q What are the constituent elements of the blood? The blood is made of a liquid and a cellular part the fluid part is called as plasma and in it there are several substances li

Fungi, Candida albicans, and Aspergillus species are the most common of the...

Candida albicans, and Aspergillus species are the most common of the many fungal organisms identified as causing IE. Fungal endocarditis arises in specific settings. Valve replace

Mechanical prosthetic valves, Mechanical Prosthetic Valves :  These patien...

Mechanical Prosthetic Valves :  These patients should have lifelong anticoagulation. In the absence of anticoagulation systemic embolism and strokes have been reported to be 5-50

Why ascending method of paper chromatography is preferred, Why Ascending Me...

Why Ascending Method of Paper Chromatography is Preferred? The ascending method is preferred because of the simplicity of the set up. In actual method the substance to be separ

Respiration, Define respiration in animals

Define respiration in animals

Define precipitation or solubility of proteins, Define Precipitation or Sol...

Define Precipitation or Solubility of Proteins? Most of the functional properties are dependent on the degree to which the proteins are soluble. The solubility behaviour provid

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd