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

Origin and delivery - transport in phloem, Origin and Delivery - Transport ...

Origin and Delivery - Transport in Phloem We have stated above that transport of photosynthates starts from leaves and ends up in one or the other sink tissue. Though this is

How do populations of predators vary in predatism, How do populations of pr...

How do populations of predators and prey vary in predatism? Whenever a predator population enhances at the first moment the prey population tends to decrease. At a second momen

What are the physio-chemical properties of vitreous, What are the physio-ch...

What are the physio-chemical properties of vitreous? PHYSIO-CHEMICAL PROPERTIES OF VITREOUS: Vitreous is a clear gel like optically empty structure. Its physio-chemical prop

Theories of origin of life, what we the strengths and weaknesses of pangene...

what we the strengths and weaknesses of pangenesis theory

Chordata.., write the classification of chordata?

write the classification of chordata?

What do you mean by pericardium, Q. What do you mean by Pericardium? Pe...

Q. What do you mean by Pericardium? Pericardium is the sac covering the heart. Pericardium consists of two layers-the visceral pericardium (epicardium) and the parietal pericar

What is the stage of cellular respiration, What is the stage of cellular re...

What is the stage of cellular respiration during which carbon dioxide is liberated? In aerobic cellular respiration the release of carbon dioxide occurs in the transformation o

Fusarium toxins, Another important genus of mycotoxin producers is Fusarium...

Another important genus of mycotoxin producers is Fusarium, many species of which produce members of the trichothecene family of mold metabolites like deoxynivalenol, neosolaniol a

Entropy, Entropy is the degree of disorder in a system. As the energy is t...

Entropy is the degree of disorder in a system. As the energy is transferred from one form to another form, some of it is lost as heat; as the energy decreases, the disorder in sys

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