Question

a cultivator loosens the soil, so the plants are easier to remove. the corn is then harvested with a mechanical harvester that removes the ears of corn from the stalks and dumps them into a collection bin. most of the corn grown in the u.s. is either fed to cattle or turned into corn syrup and other corn - based processed food ingredients. most of the corn grown in the u.s. is also genetically modified. this means that the genes of the plants have been reorganized and/or had genes from other organisms added to them. organisms that have undergone this process are called genetically modified organisms (gmo). the most common reason for genetically modifying corn is to make it resistant to the pesticides that are applied to corn fields to kill the competing weeds.
vertical farming
conventional farming uses horizontal space, and it can require a lot of it. this is becoming increasingly problematic, and there is a limit to the amount of land on the earth’s surface that can be put to agricultural use. the horizontal space requirement can also make it difficult to grow food in urban areas, where not only is there virtually no land set aside for agriculture, even the space allotted to businesses and individuals is at a premium. vertical farming solves this problem by finding more space by “looking up,” rather than “out.” vertical farming is growing plants indoors, where of light, nutrients, and temperatures are carefully controlled to optimize whatever is being grown. it is vertical because plants are grown in stacked layers. some vertical farms are as much as several stories tall. there are three main types of vertical farming: hydroponics, aeroponics, and aquaponics.

1. what happens to most corn that is grown in the u.s.?
2. what’s the most common reason for genetically modifying corn?
3. which of the following statements is true?

a. conventional farming uses vertical space
b. vertical farming uses horizontal space
c. vertical farming uses vertical space
d. horizontal farming uses vertical space

1. there is a limit to the amount of ____ on earth that can be put to agricultural use

a. water
b. land
c. nutrients
d. vertical space

Explanation:

Question 9

From the text: "Most of the corn grown in the U.S. is either fed to cattle or turned into corn syrup and other corn - based processed food ingredients."

The text says: "The most common reason for genetically modifying corn is to make it resistant to the pesticides that are applied to corn fields to kill the competing weeds."

• Option a: The text says "Conventional farming uses horizontal space", so a is wrong.
• Option b: The text states "Conventional farming uses horizontal space, and it can require a lot of it. This is becoming increasingly problematic, and there is a limit to the amount of land on the Earth’s surface that can be put to agricultural use. Vertical farming solves this problem...", and "Vertical farming is growing plants indoors, where of light, nutrients, and temperatures are carefully controlled to optimize whatever is being grown. It is vertical because plants are grown in stacked layers." So vertical farming uses vertical space and conventional farming uses horizontal space, so b is correct.
• Option c: Vertical farming uses vertical space, not horizontal, so c is wrong.
• Option d: Horizontal farming uses horizontal space, not vertical, so d is wrong.

Answer:

Most of the corn grown in the U.S. is either fed to cattle or turned into corn syrup and other corn - based processed food ingredients.

Question 10