In an experiment using radioactively labeled fatty acids, the radioactivity was localized to lysosomes. this surprised the researchers, as they thought that the radioactivity would be in the plasma membrane. they later determined that these cells had defective anabolic enzymes in a specific organelle that led to this result. which organelle was defective in these cells?

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

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.

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet?