Final answer:
The terms are matched with their corresponding definitions as follows: A. Postpartum Insemination with 1, B. Artificial Insemination with 3, and C. Estrus with 2, relevant to the reproduction and management of cattle in agriculture.
Step-by-step explanation:
To match the definitions to the appropriate terms in the context of bovine reproduction:
- A. Postpartum Insemination is the practice of impregnating a cow that has already given birth, which matches with definition 1.
- B. Artificial Insemination refers to the process of mechanically fertilizing a cow to induce pregnancy, matching with definition 3.
- C. Estrus is the period during which a cow is fertile and receptive to mating, which aligns with definition 2.
Estrus is part of the estrous cycle, a hormonally induced physiological condition preparing the body for successful mating, which occurs in species such as the pronghorn antelope. Artificial insemination can involve techniques such as intrauterine or intracervical insemination and can be timed with the estrus cycle for higher success rates. Postpartum insemination is aimed at impregnating a cow following the period of recovery after giving birth, facilitating the management and productivity of dairy and beef operations.