Ornithophily - cross-pollination, Biology

Assignment Help:

Ornithophily - Cross-pollination

In tropical areas, the birds dominate over insects as important pollinators. The most common among them are humming-birds, sun-birds and honey-eaters. Flowers pollinated by birds are generally orange, red, or yellow. Birds see well in this region of visible light. Birds do not have a strong sense of smell; consequently, bird-pollinated flowers usually lack much scent. Characteristic features of ornithophilous flowers are their tubular (Nicotiana glauca), cup shaped (Callistemon), or urn shaped (some members of Ericaceae) form, bright color, excess of pollen and nectar. As humming-birds (they occur only in The New World) are able to extract nectar while hovering over the flower, they do not need any heavy platform to land when they visit pendant flowers for pollination. In contrast, sun-birds (old world inhabitants) can perch in any position and suck out nectar even if they visit erect flowers.


Related Discussions:- Ornithophily - cross-pollination

Why fats have highest heat energy density, Why Fats have highest heat energ...

Why Fats have highest heat energy density? Fats have highest heat energy density of 9 Kcal/g. It is the major storage form of energy in body requiring least space and minimum w

Sample titration - estimation of nitrogen & protein content, Define Sample ...

Define Sample Titration - Estimation of nitrogen and protein content? Take the given ammonium sulfate solution into a 100 ml volumetric flask and dilute to the mark with distil

What is an effect of increased temperature, What is the effect of increased...

What is the effect of increased temperature on a non enzyme catalyzed reaction? What are the effects of increased temperature on an enzyme catalyzed reaction?

Explain the the methods of community and population, What is a community? ...

What is a community? What is the difference among the methods of community and population? A community is a set of populations of living beings that live in the similar region

What are the final digestion products of protein, What are the final diges...

What are the final digestion products of (a) protein, (b) fat, (c) starch?   a) Proteins are digested to amino acids, b) fats are digested to fatty acids and glycerol,

What are the five human digestive secretions, Q. What are the five human di...

Q. What are the five human digestive secretions? Which of them is the only pne that does not contain digestive enzymes? The human digestive secretions are: bile, saliva, gastri

Why use the properties of water, In agriculture areas, farmer pay close att...

In agriculture areas, farmer pay close attention to d weather forecast. Right before a predicted overnight freeze, farmers spray water on crops to protect the plants. Use the prope

Phylum annilida, how we attempt a question of phylum annilida in exam?

how we attempt a question of phylum annilida in exam?

Absorption of amino acids and peptides, Absorption of amino acids and  pep...

Absorption of amino acids and  peptides Generally,  the  dietary proteins are almost comp!etely  digested to their constituent amino acids and these are rapidly absorbed  from

Gene targeting in es cells, Gene targeting in ES cells: In some of the li...

Gene targeting in ES cells: In some of the livestock species pro-nuclear injection cannot be used to modify the animals' own genes due to various reasons especially non availabil

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