lsar cr test 4

devesh · Posted: Fri Aug 10, 2007 12:30 am Post subject: lsar cr test 4

Two paleontologists, Dr Tyson and Dr. Rees, disagree over the interpretation of certain footprints that were left among other footprints in hardened volcanic ash at site G. Dr. Tyson claims they are clearly early hominid footprints since they show human characteristics: a squarish heel and a big toe immediately adjacent to the next toe. However, since the footprints indicate that if hominids made those prints they would have had to walk in an unexpected cross-stepping manner, by placing the left foot to the right of the right foot. Dr. Rees rejects Dr. Tyson’s conclusion.
7. The disagreement between the two paleontologists is over which one of the following?
(A) the relative significance of various aspects of the evidence
(B) the assumption that early hominid footprints are distinguishable from other footprints
(C) the possibility of using the evidence of footprints to determine the gait of the creature that made those footprints
(D) the assumption that evidence from one paleontologic site is enough to support a conclusion
(E) the likelihood that early hominids would have walked upright on two feet

devesh · Posted: Fri Aug 10, 2007 12:48 am Post subject:

One more...
Impact craters caused by meteorites smashing into Earth have been found all around the globe, but they have been found in the greatest density in geologically stable regions. This relatively greater abundance of securely identified crater in geologically stable regions must be explained by the lower rates of destructive geophysical processes in those regions.
The conclusion is properly drawn if which one of the following is assumed?
(A) A meteorite that strikes exactly the same spot as an earlier meteorite will obliterate all traces of the earlier impact.
(B) Rates of destructive geophysical processes within any given region vary markedly throughout geological time.
(C) The rate at which the Earth is struck by meteorites has greatly increased in geologically recent times.
(D) Actual meteorite impacts have been scattered fairly evenly over the Earth’s surface in the course of Earth’s geological history.
(E) The Earth’s geologically stable regions have been studied more intensively by geologists than have its less stable regions.

radhika1306 · Posted: Fri Aug 10, 2007 7:55 am Post subject:

I think

1 C

What's OA

devesh · Posted: Sun Aug 12, 2007 12:24 am Post subject:

OAs A, D

chatekar · Posted: Sun Aug 12, 2007 7:59 am Post subject:

Devesh,

Its D for the first and A for the second. Right?

Thanks

UmanG · Posted: Mon Aug 13, 2007 2:08 am Post subject:

It's A for the first and D for the second.

chatekar · Posted: Mon Aug 13, 2007 2:17 am Post subject:

UmanG,

Could you please explain your options?

Thanks