The key to solving this analogy is to know that the prefix sept- means seven and the prefix oct- means eight. So, a "septuagenarian" is someone who is in their seventies and an "octogenarian" is someone who is in their eighties.

An "aquarium" is a place where ocean-dwelling creatures are housed and displayed. So, to solve this analogy you have to determine which of these words describes an enclosure where a land-based creature (such as a snake) might be housed. It can be helpful when solving this problem to consider your Latin prefixes. "Terr-" means of or related to the Earth. So, a "terrarium" is the correct answer. Additionally, an "arboretum" is a place where trees are grown; "reptilian" means relating to the qualities of reptiles (like snakes and alligators).

To solve this analogy you need to rely on your knowledge of Greek roots. To begin with the prefix ichthy- means fish, so "ichthyology" is the study of fish. So, what is "ecclesiology" the study of? The Greek prefix ecclesi- means congregation, church. So, "ecclesiology" is the study of churches.

The prefix theo- means related to religion or to "God." So, "theocracy" is the rule of a government through "God" or the application of religious laws. To solve this analogy you need to determine what "autonomy" is the rule of. Well, auto- means "self," so "autonomy" is the ability to rule oneself.

The Greek and Latin prefix anti- can mean either opposite, against as in "antisocial" which means not social. Or, anti- can mean old, ancient. In "antiquated" it is used in the latter sense, "antiquated" means very old, outdated, ancient. Something from the past could be described as "antiquated," so which of these is a word that could describe something from the present? The correct answer is "current" which means contemporary, in the present. Additionally, "youthful" means young; "mundane" means ordinary, boring; "severe" means intense, harsh; "obdurate" means stubborn, intractable.

The Greek prefix astr- means stars, sun and the Greek root -nom- means arrangement, order, study. So, "astronomy" is literally the arrangement of the stars or the study of outer space. Furthermore, the Greek prefix geo- means Earth, of the Earth and the suffix -ology means study of. So, "geology" is literally the study of the Earth or the study of rocks and rock formations.

"Cytology" is the study of cells, so to solve this analogy you need to determine what "nomology" is the study of. To solve this problem it helps to consider the meaning of the Greek prefix nom- which means law, order. So, "nomology" is the study of law.

To solve this problem you need to rely on your knowledge of Greek prefixes. To begin with "meteorology" is the study of weather, the atmosphere, and weather patterns. So, to solve this analogy you need to determine what "anthropology" is the study of. The Greek prefix anthrop- means human, so "anthropology" is the study of mankind, the study of humans.

"Xenophobia" is an irrational dislike or fear of people from other countries. The correct answer will demonstrate a relationship between a fear and the object of that fear. "Arachno" derives from the Greek root meaning spider, and "arachnophobia" is the fear of spiders.

To begin with the suffix -phobia means fear of. "Claustrophobia" is the fear of being "trapped," the fear of tight spaces. So, to solve this analogy you need to determine what someone who suffers from "acrophobia" is afraid of. The key here is the prefix acro- (as in "acropolis"), it means height, high. So, "acrophobia" is the fear of "heights" or high places.