You are reviewing population pyramids of different countries for an exam. The pyramid of a particular country has a very high number of individuals in the post reproductive category (ages 40 and up) and very few individuals in the group below the age of 20. In which category would you put the country?
1.Declining.
2.Stable.
3.Increasing.
4.There is not enough information to determine the appropriate category.
1
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Chromosomal islands are presumed to have a "foreign" origin based upon three observations. What are these observations and how do they indicate that chromosomal islands are "foreign" in origin?
What will be an ideal response?
What is the appropriate order of the stages of investigating whether maple trees drop their leaves in the autumn because of colder days?
(1) Maple trees are grown in two greenhouses where the only variable is temperature (15?C vs. 10?C). (2) The hypothesis is rejected. (3) There is no statistical difference in the number of leaves dropped at 10?C as compared to 15?C. (4) The observation is that maple trees drop their leaves in autumn. (5) The hypothesis is that maple trees drop their leaves because of colder temperatures. A. 1, 2, 3, 4, 5. B. 3, 4, 5, 1, 2. C. 5, 4, 3, 1, 2. D. 4, 5, 1, 3, 2. E. 3, 4, 2, 1, 5.
Accommodation enabling us to switch from focusing on something nearby to something more distant is accomplished by the ________ muscle
Fill in the blank(s) with correct word
Enzymes are catalysts because they speed up chemical reactions. How do they speed up the reaction?
What will be an ideal response?