Food scarcity

mgmt_gmat wrote:Which of the following most logically completes the reasoning?

Either food scarcity or excessive hunting can threaten a population of animals. If the
group faces food scarcity, individuals in the group will reach reproductive maturity later
than otherwise. If the group faces excessive hunting, individuals that reach reproductive
maturity earlier will come to predominate. Therefore, it should be possible to determine
whether prehistoric mastodons became extinct because of food scarcity or human hunting,
since there are fossilized mastodon remains from both before and after mastodon
populations declined, and ______.

A. there are more fossilized mastodon remains from the period before mastodon
populations began to decline than from after that period
B. the average age at which mastodons from a given period reached reproductive
maturity can be established from their fossilized remains
C. it can be accurately estimated from fossilized remains when mastodons became
extinct
D. it is not known when humans first began hunting mastodons
E. climate changes may have gradually reduced the food available to mastodons

mgmt_gmat wrote:Which of the following most logically completes the reasoning?

Either food scarcity or excessive hunting can threaten a population of animals. If the
group faces food scarcity, individuals in the group will reach reproductive maturity later
than otherwise. If the group faces excessive hunting, individuals that reach reproductive
maturity earlier will come to predominate. Therefore, it should be possible to determine
whether prehistoric mastodons became extinct because of food scarcity or human hunting,
since there are fossilized mastodon remains from both before and after mastodon
populations declined, and ______.

A. there are more fossilized mastodon remains from the period before mastodon
populations began to decline than from after that period - though more fossilized mastodon remains are available how are they helpful for the analysis. Incorrect
B. the average age at which mastodons from a given period reached reproductive
maturity can be established from their fossilized remains - Yes, if we know this then we can easily come to know when actually mastodons become extinct. If the age is less than average then mastodons become extince because of hunting and if the age is more than average then mastodons become extince because of scarcity of food
C. it can be accurately estimated from fossilized remains when mastodons became
extinct - this is extreme, one part says it should be and option says accurately estimated.
D. it is not known when humans first began hunting mastodons - irrelevent
E. climate changes may have gradually reduced the food available to mastodons - this is also irrelevent