Why plants grow towards the light. 1  Botany: A Stem's 'Sense of Self' Contributes to Shape. 2  Scientists Discover C4 Photosynthesis Boosts Growth by Altering Size, Structure of Plant Leaves, Roots. 3  Cellulose Goes Off the Rails: Without Microtubule Guidance, Cellulose Causes Changes in Organ Patterns During Growth.
Tasting hairs on the legs of a roach can not only help it determine a food source, but help it avoid pesticides as well. Glycocides -- poison baits mixed with glucose -- were traditionally used to dose the sweet-loving cockroach with lethal toxins.
Luckily, roaches also leave a tell-tale odor as well as other signs of infestation. When a very severe infestation is present, cockroaches can often be seen during the day. These unpleasant insects are quite distinctive and are easily identified. Between half an inch (1.3 cm) and two inches (5 cm) long, roaches have flat elongated bodies and are colored light or dark brown or black.