Producers are at the bottom or beginning of the food chain because they produce their own food. producers do not eat other organisms unless there are exceptions. consumers eat other consumers and also eat producers.
Because those vital organs are extremely fragile the bones act as a type of barrier between the organs and whatever the body may come in contact with. Bones like the ribs protect your heart. Other organ like the eyes, brain, lungs, and spinal cord are all protected by bones or your skeleton.
Since ribosomes produce proteins, and the endoplasmic reticulum transports the proteins that the ribosome makes it is advantageous for a protein secreting sell to have ribosomes on the endoplasmic reticulum so that the proteins can be transported more quickly and efficiently
A bill can have a second chance after a veto.
If the president vetoes the bill, the Congress can over-ride the bill with a 2/3 vote of both houses (house and senate)...and with that, the bill becomes a law.