Hierarchy of Classification MCQs

Q1. Which category is described: 'basic unit; most shared characters'?

• A.Species
• B.Family
• C.Order
• D.Class

Answer: A. Species

Quick parse - a typical biology numerical. We are after the quantity the stem asks for. Tool of choice - F = m*a, V = I*R, n = m/M, v = f*lambda, KE = (1/2) m v^2). Rearrange it for the unknown before substituting. Numbers in: F = m*a, V = I*R, n = m/M, v = f*lambda, KE = (1/2) m v^2). Common-sense check: recall the defining law / equation for the named quantity (e.g. Lock in option A) Species. Trap-watch: option B) 'Family' is incorrect: Family: a group of related genera; option C) 'Order' doesn't hold - Order: a group of related families.

Q2. Which category is described: 'a group of closely related species'?

• A.Genus
• B.Order
• C.Class
• D.Phylum/Division

Answer: A. Genus

First, read what's there - a typical biology numerical. We are after the quantity the stem asks for. Tool of choice - valency = group number (I, II, ...) or 8 - group (V-VII). Rearrange it for the unknown before substituting. Numbers in: valency = group number (I, II, ...) or 8 - group (V-VII). Common-sense check: the modern periodic law: properties of elements are periodic functions of their atomic number. Lock in option A) Genus. Trap-watch: option B) 'Order' doesn't hold - Order: a group of related families; option C) 'Class' misses the point - Class: a group of related orders.

Q3. Which category is described: 'a group of related genera'?

• A.Family
• B.Class
• C.Phylum/Division
• D.Kingdom

Answer: A. Family

Asked for the unknown; data is laid out in the stem. By valency = group number (I, II, ...) or 8 - group (V-VII). valency = group number (I, II, ...) or 8 - group (V-VII). the modern periodic law: properties of elements are periodic functions of their atomic number. Hence option A) Family. Others fail: option B) 'Class' fails since Class: a group of related orders; option C) 'Phylum/Division' doesn't hold - Phylum/Division: a group of related classes.