Directions. 1. Wash and cut the vegetables. Blanch the asparagus spears in boiling water for 1 minute and then plunge into ice water to stop the cooking and keep them bright green and crisp. 2. Start by lining the edge of the serving tray using the red-leaf lettuce. Next layer the celery followed by the baby carrots.
Directional control valve. Directional control valves are one of the most fundamental parts in hydraulic machinery as well as pneumatic machinery. They allow fluid flow into different paths from one or more sources. They usually consist of a spool inside a cylinder which is mechanically or electrically controlled.
In a changing environment, natural selection will favor variations Variation: The differences among individuals in a population. that result in a better fitness in the new environment, resulting in adaptation and evolution. Directional selection Directional selection Directional Selection: A type of selection that removes individuals from one end of a phenotypic distribution and thus causes a shift in the distribution. occurs when natural selection favors one extreme of continuous variation. Over time, the favored extreme will become more common and the other extreme will be less common or lost.