Sunday
April 20, 2014

Homework Help: biology help please

Posted by sam on Sunday, May 24, 2009 at 2:37am.

this is the question my answer is below can someone make suggestions or help me edit it thanks - last post i forgot the question and only put in my answer

Hummingbirds need to feed several times an hour. Flowers that attract hummingbirds typically contain a lot of nectar. This keeps the hummingbird at each flower longer before it moves on to another source. Flowers that attract nectar-feeding bees typically contain smaller amounts of nectar, and therefore a bee has to visit several flowers to obtain enough nectar. Explain how both adaptations lead to better chances of successful pollination."

my answer below not sure i got it right exactly

Hummingbirds are bigger than bees, so they need more energy (plant sugar). Moreover,  it is known that hummingbirds use a lot of energy in flight and are often times very close to starvation between meals. As a result, Hummingbirds need to feed at high energy source locations such as flowers with lots of nectar, as flying around to different sources and just consuming small amounts of sugar might lead to starvation. WITH RESPECT TO POLLUNATION, if they don't have enough energy to fly and transfer the pollen to a receiving plant of the same species, then they won't reach that plant, and the pollen will go to waste with respect to reproduction ( the pollen may still be used as food ). So if the the receiving plant is, say, 50 miles away, the Hummingbird needs to have enough energy to fly that distance to transfer the pollen, and therefore that is why it eats only flowers with lots of nectar.
 
Bees on the other hand don't need as much energy, so they don't need to feed on plants with large amounts of nectar. They have enough energy to fly around and transfer the nectar by just feeding on small flowers. Since the bird feeds on multiple flowers, it gets a greater variety of pollen (presuming the flowers are of different species or even the same species but not clones) so it has a greater chance of transferring the to a correct species receipient since there are more choices (since it has pollen from multiple species) or at least a greater chance of increasing genetic diversity if the pollen is from the species but not a clone.

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