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Full-Text Articles in Education
The Nature Of Adaptations, O. R. Clark
The Nature Of Adaptations, O. R. Clark
Science Bulletin
In the October number of this bulletin, in a discussion of the influence of environment upon the growth and development of plants, the statement was made that, on the whole, plants are quite well adapted to the conditions under which they grow. As to the manner by which this ''fitness” has arisen there are some differences of opinion and, in the opinion of the writer, a great many misunderstandings. This is a question to which no ''cut-and-dried'' answer can be given but to which a fundamental principle of biology may be applied.
Environment As A Factor In The Growth And Distribution Of Plants, O. R. Clark
Environment As A Factor In The Growth And Distribution Of Plants, O. R. Clark
Science Bulletin
The form and appearance of plants and the activities which they carry on are due in large part to the inherited characteristics of their ancestors. The influence which heredity exerts should be clearly and forcefully presented to students. At the same time the expression of the hereditary traits may be greatly modified by the conditions under which! the plants grow.
Insects And Man, Roy L. Abbott
Insects And Man, Roy L. Abbott
Science Bulletin
Because of their relationship to dangerous human parasites, insects have been responsible for the death of more people than all other animals put together. Confirmation of this astounding statement can be seen in the close relationship between houseflies and typhoid fever, between rat fleas and plague, tsetse flies and sleeping sickness, and that between mosquitoes and yellow fever and malaria.
Winter Birds Of Iowa, O. R. Clark
Winter Birds Of Iowa, O. R. Clark
Science Bulletin
The study of birds should certainly form an important unit of every course in high school biology. Furthermore, this study should be continued through the entire school year in order to secure the most desirable results. The fall is an excellent time to begin the study because the number of birds to be found is not so great as to ca use confusion and the students will be able to become familiar with the means of identification and the common recognition marks of many of our common birds.
Household Insects, Roy L. Abbott
Household Insects, Roy L. Abbott
Science Bulletin
It was said above (see November Bulletin) that practically every animal is attacked by one or more kinds of insects. Man constitutes no exception to this statement, and it is my purpose in this article to deal with a few of the insects commonly found in or around our homes. Perhaps the most familiar of all household insects is the housefly.