Constant speed would have a straight and diagonal line either facing upwards or downwards in the graph. This is because speed is displacement divided by time, which becomes the slope of the graph.
Analogies are the result of convergent evolution. Interestingly, though bird and bat wings are analogous as wings, as forelimbs they are homologous. Birds and bats did not inherit wings from a common ancestor with wings, but they did inherit forelimbs from a common ancestor with forelimbs.
Answer:
Ribosomes are parts of cells that manufacture proteins with instructions from the nucleic acid in the nucleus. The proteins are used as building blocks for things in the cell, and outside in a multicellular organism.