|  | 41. | Silicon dioxide is added to prevent clumping. 
 
 | 
|  | 42. | He helped isolate one factor in agglutination, or clumping, of platelets in blood plasma. 
 
 | 
|  | 43. | Many staghorns are clumping and have creeping, branching rhizomes that are hidden behind the shields. 
 
 | 
|  | 44. | The two of them traded chippy sentiments, which brought both teams clumping onto the field. 
 
 | 
|  | 45. | This frees up your other hand to catch the pasta and keep it from clumping together. 
 
 | 
|  | 46. | This clumping fern has glossy leaflets. 
 
 | 
|  | 47. | Like aspirin, abciximab keeps platelets and proteins from clumping, but it is much stronger. 
 
 | 
|  | 48. | But most biodegradable litters last longer than the equivalent size of clay or clumping clay litters. 
 
 | 
|  | 49. | Serum sickness is primarily caused by the antibodies clumping during infusion and triggering the complement cascade. 
 
 | 
|  | 50. | This clumping perennial wildflower is native to western North America from central Canada to northern Mexico. 
 
 |