Ok...one week for some of you to catch up and here we go with homework that will count. All the homeworks for this marking period will count as one test. So look up the answers (unit 6 of the text) and make certain you have it right before you send it to me. As of this writing I have looked at 17 -18 homeworks for last week and of these 9 have gotten 5 or 6 of 6 correct. About one-half..better than it was but still that means one-half of you must do somethng different to get better results. Keep those standards high!!
Ok here are the five problems this week:
Question #1:
In a pond, which chage would most likely lead to land succession?
(1) a decrease in the amount of particles suspended in the water of the pond
(2) an increase in the speed of the water currents in the pond
(3) a decrease in the number and diversity of organisms inhabiting the shallow water of the pond
(4) an increase in the amount of sediment, fallen leaves, and tree limbs accumulating on the bottom of the pond
Question #2:
A forest community is made up of thousands of species of organisms and can exist practically unchanged for hundreds of years. This stability is due to the
(1) diversity of organisms present
(2) abundance of insects that feed on plants
(3) changes in the climate of the area
(4) lack of decomposers in the forest
Question #3:
Most green algae plants are able to obtain carbon dioxide from the environment and use it to synthesize organic compunds. This activity is an example of
(1) cellular respiration
(2) autotrophic nutrition
(3) heterotrophic nutrition
(4) heterotrophic respiration
Question #4:
If you travel inland from the shores of the present Lake Michigan, which was once much larger than it is today, you would travel through the following areas:
1. the present sandy beach
2. grasses
3. a cotton wood forest
4. a pine forest
5. an oak forest
6. a beech-maple forest (where the original shoreline
was located)
The above sequence of plant growth is an illustration of
(1) succession
(2) a food chain
(3) evolution
(4) an autotroph pyramid
Question #5:
Describe why, in question #4, the plants growing in the area of the old shoreline are beech and maple trees and no longer the grasses observed near the new shoreline.
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