Julia plants three tomato plants in different types of soil to see which is best for gardening. all three tomato plants are the same variety. they are about the same size at the start of the experiment. each plant receives the same amount of water each day. the independent variable is the

Wich organism obtains its energy from dead or decaying matter

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

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.