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6.5 Study Guide
Terms in this set (11)
What do plants compete for?
Plants compete for water, space, and light when they are limited.
One example of competition in animals is:
Two bears sharing a pot of honey.
In the summer of 1988, very little rain fell across much of Michigan, leading to a severe drought. Assuming no other changes occur, which effect on tree growth is very low rainfall most likely to cause?
Growth will be less than average
Plants are growing in the shade beneath a large tree and count the number of flowers that grow on the plants. The number of flowers produced each year remained about the same for several years until the tree blew down in a storm, and the location where the flowering plants grow now receives much more sunlight. What effect on the plant population is this change in flower production most likely to cause?
The plant population will increase.
Scientists are studying the growth of individual fish. They have built two identical ponds and put the same type of fish in each pond. Pond A is very crowded with many fish, while Pond B has only a few fish. In which pond is the growth of fish likely to be faster?
Two plants with the same inherited traits are planted in two different locations. Location A is sunny, warm, has soil high in nutrients, and receives plenty of rainfall. Location B is shaded, cool, has soil low in nutrients, and receives little rainfall. At which location is the plant most likely to produce more seeds?
In Investigation #1, she plants the usual number of seeds in one area (10), and plants double that number (20) in another area. What effect did increasing the number of seeds planted in an area have on the average growth of the plants?
The average growth will decrease.
What causes plants to be different heights?
Resource availability and Inherited traits
As you are measuring, you notice new plants growing in both populations. Is it possible to predict the exact height these plants will be when they are full grown?
No you can predict height but you cannot predict exact height.
If I get a seed from a really tall plant, what do you predict will be the height of the plant?
It should be tall.
Jim takes the seeds from the tallest white pine, and plants them in his yard. There is plenty of sunlight and water, but the soil is low in nutrients. Will his tree be as tall? Why?
No, it is lacking nutrients.
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