Assignment 9 Communities
Due October 21
1. Multiple-choice (1 point)
The most logical pollinator for the hibiscus flower is a
2. Multiple-choice (1 point)
What insect is the most likely pollinator for native azalea flowers?
All of these are likely pollinators.
3. Essay (4 points)
Which flower in the table of domestic azalea plants would be most attractive to bees
seeking both pollen and nectar. Which flower would be most attractive to butterflies?
Write a short essay that defends your answers.
4. Multiple-choice (1 point)
What insect is the most likely pollinator for the strawberry bush flower?
5. Multiple-choice (1 point)
What pollinator is the tobacco plant attracting early in the season?
6. Multiple-choice (1 point)
What pollinator is the tobacco plant attracting late in the season?
7. Multiple-choice (1 point)
The next two questions refer to the video on shrews. We are use to viewing endothermy
as an advantage over ecotothermy, but maintaining a constant body temperature is
costly in terms of energy, especially for small animals such as shrews that have large
surface areas over which to lose heat relative to their mass. How often must a shrew
once a day
many times a day
continuously, without ever resting
three times per week
only once per week
8. Multiple-select (3 points)
Select three characteristics that make the shrew an efficient predator. (There is no
partial credit for this question.)
a patient hunting style
a poisonous bite
good eye site
willingness to attack animals larger than itself
aggressiveness toward competitors
large, powerful jaws
no scent, so it can hide from prey
9. Essay (3 points)
Predators are often portrayed in the popular media as almost benevolent to prey,
keeping numbers down and taking only the very old and sick. In reality predators take
what they can get. How does the video of the hunting eagle support the latter
10. File upload (3 points)
Fill in the missing values for trapped nematodes by counting the number of nematodes
visible in the photographs of squares C3, B4, and D1. Assume that every worm in the
dish is a trapped nematode. (Do not worry if your count is not exact, since we expect
students to prodcue slightly different numbers.) Capture an image of the completed
table and submit it to WebAssign (jpg or png format).
C3 B3 B5 E2 A1 C6 D1 F4 F5
Trapped ? 8 ? 6 1 4 ? 0 2
Fruiting 1 0 0 0 0 0 0 0 0
Trapped ? 30 ? 22 2 2 ? 1 3
Fruiting 20 14 13 10 21 24 18 20 21
Use the completed table to answer questions 11-13.
11. Essay (3 points)
Write one or two sentences that indicate why so many fungal fruiting bodies are found
on day 4, when only one is found on day two.
12. Essay (3 points)
Compare the number of trapped nematodes found in the central and surrounding
squares (green and blue) to the number found in the outermost squares of the plate.
Explain these results (why are different numbers of nematodes found in different
regions of the plate?).
13. Essay (3 points)
How does the number of trapped nematodes in each square compare on day two vs.
day four? Explain the pattern that you see. (Hint: The nematodes may have reproduced
during the 2-day period between observations).