Carl Woese and Collaborators Identified Two Major Branches of Prokaryotic

question 7

Multiple Choice

Carl Woese and collaborators identified two major branches of prokaryotic evolution. What was the basis for dividing prokaryotes into two domains?

• A) microscopic examination of staining characteristics of the cell wall
• B) metabolic characteristics such as the production of methane gas
• C) metabolic characteristics such as chemoautotrophy and photosynthesis
• D) genetic characteristics such as ribosomal RNA sequences
• E) ecological characteristics such as the ability to survive in extreme environments

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Definitions:

Articular Cartilage

Hyaline cartilage covering the ends of bones within a synovial joint.

Lubricating Film

A thin layer of liquid or semi-liquid substance applied to surfaces to reduce friction and wear.

Double Layer

A double layer often refers to structures composed of two levels of material, which in biological contexts, could imply the phospholipid bilayer of cell membranes or protective coatings.

Joint Surface

The part of a bone that articulates with another bone, usually covered with cartilage to enable smooth movements.