Cientists classify clams as consumers. which observation about clams provides the strongest evidence for this classification? a. young clams are able to move from place to place. b. clams gain energy and nutrients by filtering particles from the water. c. clams use calcium compounds to make a hard shell. d. clams live on the ocean floor, and sometimes survive without sunlight.

Speed is the ratio of the distance of an object moves to

When a cell is in a solution that has the same concentration of water and solutes as its cytoplasm, the cell is said to be in a(n) solution. a. isotonic b. hypotonic c. hypertonic b. facilitated

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.