Step 1: Analyzing the equation.
The equation \( y = 1 \) represents a horizontal line where the value of \( y \) is constantly 1 for all \( x \). A horizontal line has a slope of 0.
Step 2: Analyzing the options.
- (A) point: Incorrect. A point does not represent an equation of the form \( y = 1 \).
- (B) line with a slope of 0: Correct. The equation represents a horizontal line, which has a slope of 0.
- (C) line with a slope of infinity: Incorrect. The equation \( y = 1 \) is horizontal, not vertical.
- (D) line with a slope of 1 passing through (1,1): Incorrect. The equation \( y = 1 \) does not pass through (1,1), and its slope is not 1.
Step 3: Conclusion.
The correct answer is (B) as \( y = 1 \) represents a horizontal line with a slope of 0.
In an experiment to examine the role of exopolymetric substances (EPS) on bacterial growth, a wild-type strain (S⁺) and a mutant strain deficient in EPS production (S⁻) were grown in monocultures as well as in co-culture (in equal proportion of S⁺ and S⁻). The CFU (colony forming units) of these cultures measured after 24 hours are shown in the following figure. 
Which one of the following phenomena best describes the interaction between the wild-type strain (S⁺) and mutant strain (S⁻)?
Match the diseases in Group A with their corresponding causative microorganisms in Group B 
Match the metabolic pathways in Group A with corresponding enzymes in Group B 
Which one of the following matches is CORRECT between the microorganisms given in Group A with their requirement of oxygen in Group B? 