Bison grazing on grasses growing in a meadow represent
A) a consumer eating a producer.
B) a predator eating a consumer.
C) anaerobic metabolism.
D) two producers exchanging energy.
Question 2
If ethanol production in the United States continues to increase after 2015, it will need to rely on
A) even more corn that will not be available to feed the hungry people of the world.
B) second-generation biofuel using enzymes that convert cellulose to fermentable sugar.
C) manure and other animal wastes to generate methane, which in turn is used to produce alcohol.
D) any plant material and enzymes that convert sugars into cellulose, methane, and oxygen.
Carnivores such as these wild dogs have skeletal adaptations for eating meat.
The Shrinking and the Fastest-Growing Cities
The energy set-point view that is the basis of many people’s thinking about hunger and eating.
Healthy eating is a way of life
Changing Dimensions of the Pregnant Uterus. Numbers Represent Weeks of Gestation