Find all School-related info fast with the new School-Specific MBA Forum

It is currently 24 Jul 2014, 08:58

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Despite its 1989 designation as a threatened species under

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
User avatar
Joined: 24 Oct 2006
Posts: 32
Followers: 0

Kudos [?]: 0 [0], given: 0

Despite its 1989 designation as a threatened species under [#permalink] New post 24 Apr 2007, 23:33
Despite its 1989 designation as a threatened species under the federal Endangered Species Act, the desert tortoise, Gopherus agassizii, has declined in numbers by ninety percent since the 1980s. Although federal protection made it illegal to harm desert tortoises or remove them from the wild of the southwestern North American deserts, this measure has been insufficient to reverse the speciesтАЩ decline, and further intervention is required.
Recovery has been slow, partly due to the desert tortoiseтАЩs low reproductive potential. Females breed only after reaching full size at fifteen to twenty years of age, and even then may only lay eggs when adequate forage is available. Although the number of eggs in each clutch varies, and each female might lay a few clutches in one season, the average mature female produces only a few eggs annually. From these precious eggs, hatchlings emerge wearing soft shells that will harden slowly into protective armor over the next five years. The vulnerable young are entirely neglected by adult tortoises, and only five percent ultimately reach adulthood.
Predators are blamed for most tortoise deaths; ravens, specifically, are estimated to cause more than half of the juvenile tortoise deaths in the Mojave Desert. Tortoise eggs and juveniles, with their delicate shells, can fall prey to many birds, mammals, and other reptiles. For protection from predators, as well as from desert temperature extremes, tortoises of all ages burrow into the earth. However, if rabbits and rodents are scarce, larger mammalian predators may dig tortoises out of their burrows, devouring even mature tortoises despite their hardened shells.
Even with current protections from human interference, the desert tortoise faces a tough recovery, so additional measures must be taken. First, the limited habitat of desert tortoises, with soil suitable for their burrows, must be protected from development. Next, urban expansion often has the unintended effect of increasing raven populations, so aggressive measures to control the birds are necessary to increase desert tortoise hatchling survival rates. Finally, released captive tortoises typically perish, and can pass upper respiratory tract disease into the wild population with devastating consequences, so continuing education of pet tortoise owners is essential.

Question: It can be inferred from the passage that the desert tortoise mortality rate would be most likely to decrease if which of the following were true?
A. Desert tortoise burrows were cooler.
B. Male and female tortoises mated more frequently.
C. Adult tortoises provided better care for their young.
D. Forage plants were abundant in the habitat of the desert tortoise.
E. Rabbits were abundant in the habitat of the desert tortoise.

C or E?
Manager
Manager
avatar
Joined: 26 Oct 2006
Posts: 177
Location: uk
Followers: 1

Kudos [?]: 3 [0], given: 0

GMAT Tests User
 [#permalink] New post 24 Apr 2007, 23:59
It would be E.
It has been mentioned if the number if rabbits are less then only the tortoise fall prey to other animals. Moreover it is natural in the part of adult tortoise not to take care of the young which can't be changed.
Director
Director
avatar
Joined: 29 Jul 2006
Posts: 877
Followers: 3

Kudos [?]: 13 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 Apr 2007, 05:06
dips wrote:
It would be E.
It has been mentioned if the number if rabbits are less then only the tortoise fall prey to other animals. Moreover it is natural in the part of adult tortoise not to take care of the young which can't be changed.


Good explanation...I inclined towards C but if the rabbits are scarce then even the adult tortoises are in danger...E it is.

Whats the OA??
Intern
Intern
User avatar
Joined: 24 Oct 2006
Posts: 32
Followers: 0

Kudos [?]: 0 [0], given: 0

 [#permalink] New post 27 Apr 2007, 01:05
vineetgupta wrote:
dips wrote:
It would be E.
It has been mentioned if the number if rabbits are less then only the tortoise fall prey to other animals. Moreover it is natural in the part of adult tortoise not to take care of the young which can't be changed.


Good explanation...I inclined towards C but if the rabbits are scarce then even the adult tortoises are in danger...E it is.

Whats the OA??


The OA is E. I had chosen C:-( But thinking again, realized that even if adults take care of their young, is may not result in the young being protected. Its not guaranteed..
  [#permalink] 27 Apr 2007, 01:05
    Similar topics Author Replies Last post
Similar
Topics:
7 Experts publish their posts in the topic Despite its 1989 designation as a threatened species under carcass 9 04 Jun 2013, 13:39
Despite its 1989 designation as a threatened species, the sushbis 1 05 Jun 2011, 07:37
Despite its 1989 designation as a threatened species under t LevFin7S 13 14 Nov 2009, 21:10
Despite its 1989 designation as a threatened species under acer2knight 9 05 Jul 2009, 18:45
19 Experts publish their posts in the topic Some species of Arctic birds are threatened by recent sharp antiant 69 15 Apr 2006, 06:46
Display posts from previous: Sort by

Despite its 1989 designation as a threatened species under

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.