Blood & Circulation

• Characteristics of Acquired (Adaptive) Immunity:
• Acquired immunity is distinguished by exquisite antigenic specificity, diversity, immunological memory, and self/non-self discrimination.
• Inaccurate Statement: The statement 'It is not specific to a particular disease' is FALSE (innate immunity is non-specific, whereas acquired immunity is strictly antigen-specific) [Option 2].

Correct option: (2) Its not specific to a particular disease

• Comparative Ejaculate Volumes:
• Boar: Characterized by massive ejaculate volume of $150 - 300\text{ ml}$ (up to 500 ml).
• Stallion (Horse): High volume of $50 - 100\text{ ml}$.
• Dog: Volume typically ranges from $5 - 20\text{ ml}$ (including presperm, sperm-rich, and prostatic fractions).
• Bull: Concentrated, low volume of $4 - 8\text{ ml}$.
• Ram: Highly concentrated, very low volume of $0.8 - 1.2\text{ ml}$.
• Descending Sequence of Ejaculate Volume:

• nalysis:
• (Boar> horse> dog> bull): Correct sequence.

Correct option: (3) Boar> horse> dog> bull

• Etymology of 'Pheromone': The scientific term 'pheromone' (derived from Greek pherein = to carry/transfer, and hormon = to stimulate) was coined in 1959 by the German biochemist Peter Karlson and the Swiss entomologist Martin Lüscher.
• Definition: Defined as chemical substances secreted to the outside by an individual and received by a second individual of the same species, in which they release a specific behavioral or endocrine response.

Correct option: (2) Karlson & Luscher

Analyzing the statements in relation to Initiation of impulses from sense organ/receptors:

The correct option is Option 1: (A), and (B) only..