The Tasmanian devil is a marsupial mammal that lives only on the island of Tasmania off the coast of Australia Within the past 20 years, the Tasmanian devil population has been devastated by an infectious cancer that can be
passed from animal to animal. Scientists who have studied the Tasmanian devil believe this cancer may lead to
the extinction of the species. What factor regarding the population's gene pool justifies the scientists' prediction
of future extinction? Explain my

Casts and mold are a type of preservation where the original material decays, leaving a mold in surrounding rock that can be filled with another sediment a. true b. false

Eutrophication caused by human nutrient pollution.

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.