You searched for: “aphototactic
aphototactic (adjective), more aphototactic, most aphototactic
Descriptive of organisms that don't respond to light: During biological experiments with phototropism of growing plants that normally bend toward light, biologists covered the tips of some seedlings with lightproof collars and they discovered that they became aphototactic plants because they wouldn't bend toward the light.

When the tips of the seedlings were covered with transparent collars or when lightproof collars were put below the tips, the seedlings bent toward the light and so they did not become aphototactic plants.

In his later years, Charles Darwin became increasingly interested in the study of plants. In 1881, he and his son, Francis, published a book called The Power of Movement in Plants, in which they reported their systematic experiments regarding the way in which growing plants bend toward light, a process known as phototropism.

—Compiled from information located in
The Living World, Second Edition, by George B. Johnson;
Washington University, St. Louis, Missouri;
McGraw-Hill Companies, Inc.; 2000; page 399.
This entry is located in the following unit: a-, an- (page 15)