During the 1990s, many wheat fields in arizona had to be destroyed due to the presence of what?
a. ergotism
b. corn smut
c. karnal bunt fungus
d. all of the above

The correct answer is option C.

Explanation:

During the 1990s, in an inspection, it was found that spores of Karnal bunt were present in Arizona wheat for the first time in the U.S.

The Animal and Plant Health Inspection Service announced an emergency and destroyed fields of wheat for quarantining it from Arizona wheat.

Thus, the correct answer is option C.

events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.