The ____ hypothesis predicts that ecosystem functions will be maintained more reliably in natural communities when
multiple species perform a given ecological function but differ in their responses to environmental changes
a. scientific redundancy
b. ecosystem function
c. biological insurance
d. natural community
e. fungal dominance
ANSWER: c
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Describe the stages at which genetic sex, gonadal sex, and phenotypic sex are established
What will be an ideal response?
An essential nutrient __________
a. is produced in high quantities in the body b. is produced in small quantities in the body c. must be obtained through the diet d. is a rich source of minerals
Darwin's theory of evolution is supported by many modern pieces of evidence. Check all that apply.
A. Human population growth. B. Comparative studies of animal structures. C. An understanding of the mechanism of heredity. D. New measurements of the age of the earth. E. Similarities in DNA of related species.
In the human genetic disease sickle cell anemia, a single change in the genetic sequence of the hemoglobin-beta gene results in the amino acid valine being substituted for the amino acid glutamic acid in the beta chain of the hemoglobin protein. Which
level(s) of the protein structure will be affected? A) primary structure B) secondary structure C) tertiary structure D) quaternary structure E) primary, secondary, tertiary, and quaternary structures