In most cases, primary food production occurs in a process called photosynthesis, which is powered by sunlight. In a few environments, primary production happens though a process called chemosynthesis, which runs on chemical energy. Together, photosynthesis and chemosynthesis fuel all life on Earth.
Eat 5 â 7 servings of meat and beans per day. This depends on the total number of calories you consume in a day. 1  If you consume 1600 â 1800 calories, eat 5 servings per day. 2  If you consume 2000 calories, eat 5 Â½ servings per day. 3  If you consume 2200 calories, eat 6 servings per day. 4  If you consume 2400 â 2600 calories, eat 6 Â½ servings per day.
According to the 2005 Dietary Guidelines for Americans, you should consume between five and 13 servings of fruits and vegetables each day.This is equivalent to about 2 1/2 to 6 1/2 cups daily, depending on the amount of calories you need to consume for your weight and level of activity.For example, if you take in 2,000 calories daily, you should consume nine servings, equivalent to about 4 1/2 cups.These servings should be divided about equally between fruits and vegetables -- four to five servings of each daily.ccording to the 2005 Dietary Guidelines for Americans, you should consume between five and 13 servings of fruits and vegetables each day.