True
The crop productivity is basically affected by pests mainly weeds, pathogens and animals. According to a research by E.-C. OERKE, the potential loss to wheat and cotton crop was 50 % and 80 % respectively. 25-30 % of soya bean is lost every year due to pest attack. Out of all pests the most dangerous is the animal which as per an estimate has high potential of destroying the crops up to 34% while pathogens can destroy 16-18 % of crops.
Your answer would be B. Eating nuts and acorns
Answer: The sodium-potassium pump.Explanation:
The concentration of sodium and potassium inside and outside the muscle cells are important in the regulation of contraction. These concentrations differ when a muscle is relaxing or contracting.
<span><span>Contraction: potassium concentrations are higher outside the cell than inside the cell.</span><span>Relaxation: the potassium concentrations are higher inside the cell than outside the cell.</span></span>
hope this helps :)
I believe the correct answer would be the parathyroid hormone (PTH) and calcitonin. Both of this hormones work in hand in hand in regulating the phosphate and the calcium levels present in the blood. Hope this answers the question.