Examine the Lucy (Australopithecus afarensis) skeleton. Describe at least two postcranial (below the head) traits that indicate that Australopithecus afarensis was adapted for bipedalism.

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

What are 3 reasons that natural selection occurs

In the first stage of the nuclear fuel cycle the spent fuel must be transported, processed, and disposed of properly. true or false