Answer:
Tolerance to heat, light and parasite.
Explanation:
Characteristics of tolerance to heat, light and parasite are the three reasons that might use a higher percentage of Nguni on the sector of livestock farmers in South Africa in 2003. The temperature of South Africa is extremely high which can be tolerated by the Nguni cattle due to its good characteristics. The Nguni cattle can bear extreme temperature, high intensity of light and resistance to parasites make it best suited for that environment.
 
        
             
        
        
        
Answer:
an indicator helps us to see the equivalence point (or end point of the valuation) during a titration experiments by causing the color change.
Explanation:
 
        
                    
             
        
        
        
... a Y chromosome from the father.
        
             
        
        
        
C cells of the thyroid gland secrete calcitonin.
<h3>
What does C cells of thyroid gland produce?</h3>
- The thyroid follicle, which is the gland's active component, is encircled by a single layer of epithelial cells, and the lumen is stuffed with colloidal material. 
- It includes parafollicular cells, or C cells, which release calcitonin.
- The C-cells of the thyroid gland secrete calcitonin, a 32 amino acid hormone.
- When the concentration of blood calcium has grown over the usual range, the thyroid gland releases the hormone calcitonin, which lowers the level. 
- The parafollicular cells, sometimes referred to as the C cells, of the thyroid gland are the principal producers of this polypeptide hormone, which has 32 amino acids.
Learn more about thyroid gland here:
brainly.com/question/27523862
#SPJ4
Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: The C cells of the thyroid gland secrete
a) TSH. 
b) parathormone. 
c) thyroxine. 
d) triiodothyronine.
e) calcitonin