1 If the predictions of a theory cannot be confirmed after many years of careful research, it is usually safe to conclude that: the theory must be valid
the theory is not accurate
the theory needs more research funds
the theory needs to be changed
2 Many stars do not emit much visible light.
True
False 3 The most complex information sequence found in the universe is contained in:

radio signals from space
the Encyclopedia Britannica
the memory banks of supercomputers
the DNA molecule 4 The data received from the Hubble Space Telescope:

have verified the Big Bang Theory
correspond with predictions of the Big Bang Theory
are not related to the Big Bang Theory
contradict the Big Bang Theory

it has one origin of replication, but it proceeds in two directions - d)

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

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.