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

Discuss the concept of alpha-islet cells of the pancreas, Glycogen A. p...

Glycogen A. production in the liver increases in response to an increase in blood plasma levels of glucagon. B. is secreted by alpha-islet cells of the pancreas. C. bindi

Respiration, how energy enters and then flows through a biological system

how energy enters and then flows through a biological system

Transported soils-types of soils, Transported Soils These soils are for...

Transported Soils These soils are formed from the weathered material which is transported and deposited away from the site of origin. Depending upon the nature of the transport

Contamination of the implant body before insertion, Contamination of the Im...

Contamination of the Implant Body before Insertion The implant may be contaminated by manufacturing error, by the operator, from non titanium instrumentation and by the bacteri

Which type of ecological interaction is competition, Q. What is competition...

Q. What is competition? Which type of ecological interaction is competition? The Competition is the ecological interaction in which the individuals explore the similar ecologic

Define the fluidized dryers, Define the Fluidized Dryers? Fluidization ...

Define the Fluidized Dryers? Fluidization occurs when a flow of fluid upwards through a bed of particles (ranging from fine powders to particulate foods such as diced carrots)

Tissue and supporting system., what is the biological significance of the s...

what is the biological significance of the skeleton and supporting system in animals

Discuss the evolution of implants in dentistry, Q. Discuss the evolution of...

Q. Discuss the evolution of implants in dentistry? The first use of Implants dates back to 600 A.D. in the Mayan population where intraosseous implantation of animal teeth or t

Epidemiological association between hemophilia and hiv, Q. What is the epid...

Q. What is the epidemiological association between hemophilia and HIV infection? In the past the blood banks did not usually perform HIV detection tests and many hemophilic pat

How do the golgi apparatus act, Q. How do the Golgi apparatus act and the r...

Q. How do the Golgi apparatus act and the rough endoplasmic reticulum in the production and releasing of proteins? The rough endoplasmic reticulum has in its outer membrane man

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