One Word Substitution

Step 1: Concept
The question asks for the scientific name for the study of insects.
Step 2: Meaning
Entomology is the branch of zoology concerned with the study of insects.
Step 3: Analysis
- Chromatics is the science of colors. - Dactylology is the use of fingers to communicate (sign language). - Calligraphy is the art of decorative handwriting.
Step 4: Conclusion
Option (d) is the correct term.
Final Answer: (d)

Step 1: Concept
The question asks for the term describing a system of government by one person with absolute power.
Step 2: Meaning
Autocracy is a system of government by one person with absolute power.
Step 3: Analysis
- Autonomy is the right or condition of self-government. - Plutocracy is government by the wealthy. - Theocracy is government by priests in the name of God.
Step 4: Conclusion
The correct word is Autocracy.
Final Answer: (b)

Step 1: Concept
Specific terms exist for the killing of different types of people, often ending in "-cide."
Step 2: Meaning
Fratricide is the killing of one's brother or sister.
Step 3: Analysis
- Regicide is the killing of a king. - Foeticide is the destruction of a fetus. - Uxoricide is the killing of one's wife.
Step 4: Conclusion
The correct alternative is Fratricide.
Final Answer: (c)

Step 1: Concept
This is a one-word substitution task for a specific professional activity.
Step 2: Meaning
Lexicography is the activity or occupation of compiling dictionaries.
Step 3: Analysis
- Numismatics is the study of coins. - Cytology is the study of cells. - Demography is the study of populations.
Step 4: Conclusion
The correct term is Lexicography.
Final Answer: (a)

Step 1: Understanding the Concept:
A "pot-boiler" is a work of literature or art created solely to earn money, often of low quality.
Step 2: Detailed Explanation:
"Money-spinner" is any profitable venture. "Pot-hook" is a hook for hanging pots. "Pot-boiler" is the correct term for low-quality commercial art. "Blue-bird" is a bird or symbol of happiness.
Step 3: Final Answer:
Thus, "Pot-boiler" is the correct substitution.

Step 1: Understanding the Concept:
Various "-cide" words denote different types of killing.
Step 2: Detailed Explanation:
"Matricide" = murder of one's mother. "Genocide" = systematic killing of an ethnic group. "Regicide" = murder of a king. "Homicide" = killing of any human being (general term).
Step 3: Final Answer:
Thus, "Regicide" is the correct substitution.

Step 1: Understanding the Concept:
The phrase means someone excessively devoted to reading books. "Bookworm" (here written as "Book worn") is the correct term.
Step 2: Detailed Explanation:
"Student" is general. "Book worn" is likely a variant spelling of "bookworm" — someone who reads excessively. "Scholar" is a learned person but not exclusively reading. "Book-keeper" maintains financial records.
Step 3: Final Answer:
Thus, "Book worn" (bookworm) is the correct substitution.

Step 1: Understanding the Concept:
An explicit undertaking means a clear commitment or assurance to do something.
Step 2: Detailed Explanation:
"Agreement" is mutual arrangement between parties. "Decision" is a conclusion reached. "Settlement" resolves a dispute. "Promise" is an explicit assurance or undertaking to do something.
Step 3: Final Answer:
Thus, "Promise" is the correct substitution.