Which of these animals may be kept in areas where sheep or cattle graze to eat brushlike plants to ...

Which of these animals may be kept in areas where sheep or cattle graze to eat brushlike plants to make more room for grasses?
 
  a. Goats c. Llamas
  b. Geese d. Mink

Question 2

The herbicide Roundup is:
 
  a. Expensive
  b. Detrimental to the environment
  c. Effective at killing a wide variety of unwanted vegetation
  d. All answers are correct.

Question 3

A herbicide can penetrate a plant through its:
 
  a. Leaves c. Roots
  b. Stem d. All answers are correct.

Question 4

One common way to group weeds is as being common or:
 
  a. Uncommon c. Noxious
  b. Exceptional d. Toxic

Question 5

Which of these weeds can be poisonous to livestock?
 
  a. Cocklebur c. Bracken ferns
  b. Nightshade d. All answers are correct.

Question 6

Modern herbicides were first used around the time of:
 
  a. World War I c. The Industrial Revolution
  b. World War II d. The American Revolution

Question 7

One of the first chemicals used to kill plants was:
 
  a. 2-4D c. Rubbing alcohol
  b. Sawdust d. Salt

Question 8

The first hoes were made of:
 
  a. Wood c. Metal
  b. Flint d. Fiberglass