How does the cell membrane aid the cell in maintaining homeostasis? 1. The cell membrane uses energy to remove waste products from the cell through sac-like packages.

2The cell membrane controls all cellular activities in response to changes in the external environment.

3The cell membrane assists with maintaining the correct temperature by absorbing energy.

4The cell membrane extracts energy from food when the cell is low on energy.

Genetic diversity is the variation in the genes of an entire species. each circle represents a population of a particular species in different habitats. select the population with maximum genetic diversity

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

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.