Most of the energy within an ecosystem is lost ____
a. when organisms disperse
b. when organisms die
c. as a result of metabolism
d. by organisms at the top of the food web
e. by organisms at the bottom of the food web
ANSWER: c
You might also like to view...
In Darwin's time, natural selection was thought to be primarily negative. However, we have since learned that positive selection is a powerful force, and it
A) creates new gene variants that enhance the phenotype. B) retains gene variants or combinations that promote successful reproduction. C) enables people to resist infectious diseases. D) enables us to alter our genotypes.
All of the following statements accurately describe eutrophication EXCEPT which one?
A) Eutrophication may be accelerated by agricultural runoff containing fertilizers. B) Eutrophication can be part of a natural process that converts freshwater to marsh to dry land. C) Eutrophication is beneficial and enhances the diversity of life-forms in a body of water. D) Eutrophication accelerates plant and algal growth at the expense of animal diversity. E) Sewage and other organic nutrient pollutants can enhance eutrophication.
All of the genes on a single chromosome are
a) a linkage group. b) a linkage map. c) homologous. d) a locus. e) an allele.
What occurs during the phase of protein synthesis called transcription?
What will be an ideal response?