Percent of total energy used for reproduction Flower development Nectar producti
ID: 141371 • Letter: P
Question
Percent of total energy used for reproduction
Flower development
Nectar production
The orchid species Angraecum sesquipedale
The moth species Xanthopan morgani
2.Only one species of moth, Xanthopan morgani, is known to have a tongue long enough to reach the nectar in the Madagascar orchid Angraecum sesquipedale. Would the orchid be more likely to reproduce if, through many generations, its nectaries became shorter so that other insect species were able to serve as pollinators? (Select all that apply.)
Yes. If more insect species are able to use the orchid for food, then the orchid is more likely to reproduce.
Yes. We can predict that the nectaries of these orchids will tend to shorten enough that other pollinators can also feed on them.
No. If the nectaries were shorter, then the moth Xanthopan morgani would be able to feed without rubbing against the pollen.
No. If the nectaries were shorter, then insect species that use other flowers as food sources would also drink its nectar, and it would be less likely these insects would visit another orchid of the same species while carrying its pollen.
All of the above are plausible. It is impossible to predict.
3.What aspect of this graph shows that the difference in bitterness scores for very hot water and cool water is not due to random chance?
More people sampled the coffee brewed with cool water than with very hot water.
The average bitterness score for very hot temperature was more than 2 points higher than the score for cool temperature.
The error bar for normal temperature data overlaps both the cool temperature and hot temperature data.
The very hot bar on the graph has an asterisk above it.
1.Suppose that you are a scientist measuring the energy that Angraecum sesquipedale orchids use for developing flowers to the energy that orchids use to produce nectar. Your research produces the following hypothetical graph. Which of the following is an independent variable? (Select all that apply.) Orchid Energy Use 70 60 e50 O 40 30 8 20 10 Energy used for flower development Energy used for producing nectarExplanation / Answer
1. Independent variable is the one which controlled by the scientist to check the effect on the dependent variable. The orchid species Angraecum sesquipedale is one of the independent variable because the amount of nector produced would be different in different orchid species and energy spent would also vary. The moth species Xanthopan morgani is another independent variable because different inscets get attracted to different plant species. Change of pollinator specie would affect the reproduction of the flower.
2. No. If the nectaries were shorter, then the moth Xanthopan morgani would be able to feed without rubbing against the pollen. If the nectaries were shorter it would feed on the nectar and would not even come in contact with the pollinium of the flower. After feeding on the nectar it would not want to visit another flower for awhile. Other inscets might not be good pollinators for this orchid.
3. The very hot bar on the graph has an asterisk above it. The asterik indicates statistical significane of data. In the graph it indicates that the high score of bitterness in hot water is not due to random chance.
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