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

How much calories in dried fruits, How much calories in Dried fruits Dr...

How much calories in Dried fruits Dried fruits are exceptionally rich in calories and they supply significant amounts of minerals. Of the vitamins found in fruits, β-Carotene a

Examples of the energetic function of organic molecules, Q. What are the fe...

Q. What are the few examples of the energetic function of organic molecules? Since they are complex molecules, organic molecules store large amount of energy, presenting many c

Introduction to locomotion, LOCOMOTIO N - Displacement of body. Mos...

LOCOMOTIO N - Displacement of body. Mostly animals show locomotion except porifera, urochordata, corals, obelia thier larva may show locomotion. Its importance is -

Define the energy cost of growth, Define the Energy Cost of Growth? The...

Define the Energy Cost of Growth? The energy cost of growth has two components: 1) The energy needed to synthesize growing tissues; and 2) The energy deposited in these tis

Explain about the micronutrient deficiencies, Explain about the Micronutrie...

Explain about the Micronutrient Deficiencies? Micronutrient deficiencies are more common during calamities. Can you guess, why? This is due to the lack of diversified food item

Define who classification for assessment of vitamin a status, Define WHO cl...

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

Explain why the plasmid is described as a vector, Humans produce insulin fr...

Humans produce insulin from certain cells in the pancreas.The insulin gene is isolated from a human pancreas cell and then inserted into a plasmid.The DNA responsible for the synth

Phylum , General characteristics of phylum

General characteristics of phylum

What are coacervates, What are coacervates what property do they have that ...

What are coacervates what property do they have that suggests they could be a primitive cell.

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