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
KA R YOTYPE External morphology of Chromosomes specific for each species of living organisms. Karyotype can be studied in metaphase of mitosis. Karyotype includes th


dinstictive characteristics,classes of the kindom

What is the significance of Malpighian tubules? Excretory structures found in insects and some spiders. Though similar in appearance and function the two aren't homologous. Mal

Define WHO classification for assessment of vitamin A status? In addition, to the above mentioned manifestations, thickening of the hair follicles (follicular hyperkeratosis) i

The metaboilc changes would depend on the  following  factors: a)  Nature of infection b)  Severity of the infection c)  Duration of the infection d)  Presence or abse

Please answer the following question on Sequence Y: Protein databases 1. What sequence from which organism is this sequence most similar to? 2. Can you find any homo

There are two distinct methods through that cells synthesize ATP.  In  oxidative phosphorylation which containing  the electron transport  chain and the generation  of ATP is linke

Define the symptoms in Bone marrow of pernicious anaemia? The nucleated red cells of the marrow are greatly increased.  The successive nucleated cell stages in erythropoiesis a

Assume that you have 1 mL of a solution amylase (an enzyme) at a concentration of 15 mg protein/mL. Calculate the volume of diluting buffer that you would have to add to 1.0 mL of