People who live in poor countries have diets that are made up primarily of plant materials. This is because
A. plant foods are less expensive than are animal foods.
B. many calories would be lost if they fed plants to animals.
C. more people can be supported at the herbivore level than at the carnivore level.
D. All of these answers are true.
D. All of these answers are true.
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structures labeled “D” in the figure? a. They are sexual spores. b. They are haploid. c. They will germinate to produce a new mycelium. d. They will give rise to different mating strains of the fungus. e. They may fuse to produce a zygote.
What did researchers find is a profit motive that can be applied to solve the fisheries crisis?
What will be an ideal response?
When a neuron responds to a particular neurotransmitter by opening gated ion channels, the neurotransmitter is serving as which part of the signal pathway?
A) relay molecule B) transducer C) signal molecule D) response molecule
Some people eat more because they have larger ___________ responses to the sight or smell of food.
(a) fasting-phase (b) cephalic-phase (c) absorptive-phase (d) gastric-phase