Great question ! It is the nucleus.
Answer: B - mosses and lichens that can grow on Rocky surfaces
Explanation: Primary succession usually starts or begins on rock outcrops. It could include bare surfaces, volcanic mountains or an area (water surfaces) with no soil.
In primary succession, pioneer organisms including algae, lichen, mosses and fungi usually are the pioneer species. Other abiotic factors like wind and water play roles of normalizing the habitat.
Answer:
Laxatives, which enhance bowel movements, are abused by the individuals who desire to lose weight and are suffering from eating disorders. Laxative abuse leads to extreme symptoms like hypokalemia, diarrhea, abdominal pain, acid-base disturbance, and weight loss.
The majority of the laxatives are captivated by the colon and are discharged in feces or urine as metabolites. In the analysis of urine, the volume of urine gathered within a 24 hours duration is more than two liters. The level of sodium and chlorine reduces in urine and the levels of potassium will enhance in the urine.
A change in electrolyte balance and changes in acid-base results, hypokalemia is the clinical characteristic of laxative abuse. The pH of urine will decline on the basis of the extremity of the abuse. The levels of creatinine will increase, and one can witness elevation in the secretion of renin and aldosterone because of the loss of fluid.