Ornithophily - cross-pollination, Biology

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.

Posted Date: 1/23/2013 2:42:29 AM | Location : United States







Related Discussions:- Ornithophily - cross-pollination, Assignment Help, Ask Question on Ornithophily - cross-pollination, Get Answer, Expert's Help, Ornithophily - cross-pollination Discussions

Write discussion on Ornithophily - cross-pollination
Your posts are moderated
Related Questions

What is the resting membrane voltage of the neuron A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM.  The neuron is healthy.  At

Locomotion Continuous formation of new  pseudopodia keeps amoeba in constant locomotion .This is called  amoeboid  movement .It  occurs  in many  other  protozoans , in  amoebo

What is yellow fever? Yellow fever is a viral infection that happens mainly in Central Africa and in the Amazon region of South America. It is prevented through vaccination and

Advantages of mucoperiosteal flap There is no tissue loss It is advantageous in cases where there is deficiency of keratinized tissue and the soft tissue is not lost, but ma

Explain the Disadvantages of Fixation? Fixation has following disadvantages also. These are highlighted herewith: (i) It distorts the cell's appearance. (ii) Motility can

Leaf silhouettes Place a leaf on a sheet of white paper and hold it securely with thumb or finger. Press a piece of natural or artificial sponge next to an ink pad. With short,

Q. Describe Sensory Receptors? Receptor organs can detect external or internal stimuli. They can be classified according to the stimulus to which they respond: • Photorecep

Q. Describe Explicit and Semantic Memory? Explicit memory: This is the conscious recollection of information such as specific facts or events and at least in humans that can be

Q. Anatomic Factors in Patient Selection for Mitral Valvuloplasty ? The ideal patient is young, has pliable non calcified mitral leaflets, and mild subvalvular disease. TEE may