Alex was writing a story about a rocks journey through the rock cycle. However, in his report, he never wrote about his rock becoming an igneous rock. By not writing about becoming an igneous rock, is it scientifically inaccurate for his rock to “not complete the rock cycle?” Do all rocks go through the entire rock cycle? How do you know?

Which of the following was a characteristic of a dromaeosaur? modified front claw grasping with their forelimbs both a and b none of the above

Which are reasons cells undergo cell division?

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.