Last visit was: 29 Apr 2026, 08:35 It is currently 29 Apr 2026, 08:35
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.
Close
Request Expert Reply
Confirm Cancel
Sub 505 (Easy)|   Long Passage|   Science|                  
User avatar
BrightOutlookJenn
Joined: 29 Dec 2013
Last visit: 18 Nov 2025
Posts: 105
Own Kudos:
Given Kudos: 18
GMAT 1: 770 Q48 V51
Expert
Expert reply
GMAT 1: 770 Q48 V51
Posts: 105
Kudos: 531
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
rocky620
User avatar
Retired Moderator
Joined: 10 Nov 2018
Last visit: 11 May 2023
Posts: 480
Own Kudos:
Given Kudos: 229
Location: India
Concentration: General Management, Strategy
GMAT 1: 590 Q49 V22
WE:Other (Retail: E-commerce)
GMAT 1: 590 Q49 V22
Posts: 480
Kudos: 626
Kudos
Add Kudos
Bookmarks
Bookmark this Post
avatar
AndrewN
avatar
Volunteer Expert
Joined: 16 May 2019
Last visit: 29 Mar 2025
Posts: 3,490
Own Kudos:
Given Kudos: 500
Expert
Expert reply
Posts: 3,490
Kudos: 7,669
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Sajjad1994
User avatar
GRE Forum Moderator
Joined: 02 Nov 2016
Last visit: 28 Apr 2026
Posts: 16,759
Own Kudos:
Given Kudos: 6,340
GPA: 3.62
Products:
Posts: 16,759
Kudos: 51,973
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Official Explanation

6. The passage suggests that, unlike the pleiotropic hormones, oligosaccharins could be used effectively to

Difficulty Level: 600-650

Explanation

The best answer is C. Lines 16-18 state that because each pleiotropic hormone has so many different effects on a plant, pleiotropic hormones “are not very useful in artificially controlling the growth of crops” (lines 17-18). In contrast, the passage indicates that oligosaccharins have specific effects on the growth and development of plants. Thus, in comparison to the pleiotropic hormones, oligosaccharins could potentially be effective in artificially controlling specific aspects of crop development.

Choices A, B, D, and E can be eliminated because they describe functions that are not attributed in the passage either to the pleiotropic hormones or to oligosaccharins.

Answer: C
­
User avatar
Sajjad1994
User avatar
GRE Forum Moderator
Joined: 02 Nov 2016
Last visit: 28 Apr 2026
Posts: 16,759
Own Kudos:
Given Kudos: 6,340
GPA: 3.62
Products:
Posts: 16,759
Kudos: 51,973
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Explanation

7. The author discusses animal hormones primarily in order to

Difficulty Level: 500

Explanation

The author discusses animal hormones primarily in order to (A) introduce the idea of a hierarchy of hormones.

The passage initially discusses the concept of genes and how cells in plants differentiate to form different structures. It then introduces the role of chemical messengers, including hormones, in regulating this process. To further explain the concept of a hierarchy of hormones in plants, the author draws a comparison with animal hormones.

The passage explains that in animals, hormones from the hypothalamus stimulate the anterior lobe of the pituitary gland to synthesize and release various hormones that have specific effects on target organs throughout the body. This illustrates a hierarchical relationship where one hormone triggers the release of other hormones, which then have specific effects on different organs.

By discussing this hierarchy in animal hormones, the author introduces the idea that a similar hierarchy may exist in plants, as indicated by the presence of oligosaccharins that function as regulatory molecules. These oligosaccharins are released by enzymes in the cell wall and may be activated by pleiotropic plant hormones.

(A) introduce the idea of a hierarchy of hormones:
This is the correct answer. As explained earlier, the discussion of animal hormones in the passage serves to introduce the concept of a hierarchy of hormones. The passage mentions how hormones from the hypothalamus stimulate the release of different hormones in the anterior lobe of the pituitary gland, which then have specific effects on target organs throughout the body. This example illustrates the idea of a hierarchy in animal hormones.

(B) explain the effects that auxin has on plant cells:
This option is incorrect. While the passage does mention the effects of auxin on plant cells, it does not discuss animal hormones to specifically explain the effects of auxin. The focus of the passage is on contrasting the functioning of plant hormones and animal hormones.

(C) contrast the functioning of plant hormones and animal hormones:
This option is partially correct. The passage does indeed contrast the functioning of plant hormones and animal hormones by highlighting the pleiotropy of plant hormones and the hierarchical nature of certain animal hormones. However, this option does not capture the primary reason for discussing animal hormones, which is to introduce the idea of a hierarchy of hormones.

(D) illustrate the way in which particular hormones affect animals:
This option is incorrect. The passage does discuss how particular hormones affect animals, but the main focus is on comparing and contrasting the functioning of plant hormones and animal hormones, rather than providing detailed illustrations of how specific hormones affect animals.

(E) explain the distinction between hormones and regulatory molecules:
This option is incorrect. While the passage does mention hormones and regulatory molecules, it does not provide an explicit explanation of the distinction between the two. The primary purpose of discussing animal hormones is to introduce the idea of a hierarchy of hormones, as explained in option (A).

Answer: A
­
User avatar
VerbalBot
User avatar
Non-Human User
Joined: 01 Oct 2013
Last visit: 04 Jan 2021
Posts: 19,425
Own Kudos:
Posts: 19,425
Kudos: 1,010
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club VerbalBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
   1   2 
Moderators:
GMAT Club Verbal Expert
7391 posts
509 posts
363 posts