Exam 7: Food and Agriculture

The approximate energy yield of carbohydrates is 4 calories/gram;fats yield about 9 calories/gram,and proteins about 4 calories/gram.Jack and Sarah consumed the following for lunch: Jack-100 grams protein,20 grams fat,75 grams carbohydrates; Sarah- 75 grams protein,10 grams fats,75 grams carbohydrates. How many Calories each did Jack and Sarah consume?

The three crops that humans rely on for the majority of nutrients and calories are

________ can be defined as the transfer of genes for desirable traits,such as pest resistance,into crop plants from other organisms.

The parent material layer of a soil is composed of weathered

Studies of topsoil erosion on Iowa farmland shows that as much as 50 metric tons are lost per hectare during winter and spring rains.This loss is due to the loss of millimeters of soil from across the entire surface of the fields.Which type of erosion would this be?

Sustainable farming

How is the increase in corn and soy production related to livestock production for meat?

Fifty years ago,there were several hundred varieties of wheat grown in the Middle East.Now a few of the more modern high responder varieties have replaced the indigenous species.What are the implications of this change?

Vitamin A deficiencies are associated with

Obesity is a disease that affects

What is the advantage of genetically modified crops (GMOs)?

In developed countries,the most recent increases in agricultural productivity have come from

You can participate in sustainable agriculture by

Famines are most often serious when there is

Goiter is a common disease resulting from a shortage of dietary

The layer of soil that is a mixture of minerals and organic material is the

What are two common diseases that result from protein deficiencies?

The number of genetically modified organisms (GMOs)and the acreage devoted to growing them has decreased in the past fifteen years because of the huge number of opponents.

Methods of managing topography include all but which of the following?

What is the theoretical basis of the statement that we could feed more people if we would eat grain rather than feeding it to livestock?