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.
Check for cracks and holes. Roaches travel in and out of walls, doors and windows through cracks as small as 1/5 inch (0.5 cm). Check your window screens, doors and walls for holes or other damage. Put weather stripping over any cracks in your doors. Cracks and holes in the walls can be repaired with spackle or caulk.