Which statement best describes the breakdown of food in the digestive system?
carbohydrate digestion starts in the stomach and protein digestion starts in the stomach.
carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
carbohydrate digestion starts in the esophagus and protein digestion starts in the small intestine.
carbohydrate digestion starts in the small intestine and protein digestion starts in the esophagus.

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f

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.