Which of the following is a high-yielding exotic breed of cattle used in dairy farming?
A. Gir
B. Red Sindhi
C. Holstein-Friesian
D. Sahiwal
Answer: Option C
Solution (By JKExamLibrary)
Holstein-Friesian (often just called Holstein) is a high-yielding exotic breed of dairy cattle originating from the Netherlands. They are known for their high milk production, although the milk has a lower fat content compared to some indigenous breeds. Sahiwal, Gir, and Red Sindhi are important indigenous (Indian) cattle breeds known for their disease resistance and heat tolerance.
Explanation:
Transpiration occurs mainly through stomata and is a passive process driven by vapor pressure deficit. It creates transpiration pull, aiding water and mineral transport. Guttation is liquid water loss through hydathodes, bleeding is sap oozing from wounds, exudation is a general term for fluid release.
Explanation:
Parathyroid Hormone (PTH) is a peptide hormone secreted by the chief cells of the four parathyroid glands in response to low blood calcium levels (hypocalcemia). Its primary function is to increase blood calcium levels (hypercalcemic effect). It achieves this by: 1) Stimulating osteoclasts to break down bone, releasing calcium. 2) Increasing calcium reabsorption and stimulating the activation of Vitamin D in the kidneys. 3) Indirectly increasing calcium absorption in the gut via active Vitamin D. It has the opposite effect of calcitonin.
Explanation:
The pleural cavity between the visceral and parietal pleura contains a thin layer of pleural fluid, lubricating the surfaces to reduce friction during lung expansion and contraction. Synovial fluid is in joints, cerebrospinal fluid surrounds the CNS, lymph is in the lymphatic system. Pleural effusion is excess accumulation.
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