The patellar reflex or knee(j)erk reflex doesn't happen when your leg is straight because the tendon is relaxed. In order for the reflex to be elicited, the tendon must be flexed or stretched.
The correct answer is soil structure. Soil structure refers to the arrangement of soil separates into units which are called soil aggregates which possess solids and pore space. Aggregates are separated by planes of weakness and are dominated by clay particles. Example of an aggregate is silt and fine sand.
The statement “Decomposers are those organisms that recycle matter in the ecosystem” describes decomposers. Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition.
I think this one is correct: C. You cannot view live specimens because the necessary preparation kills cells.
