A researcher returns from the Amazon River with 10 individuals of a species of fish and establishes a small breeding colony in her laboratory
She maintains the colony for several years (many fish generations), always maintaining the number of adult fish between 10 and 30. She notices that as generations of fish are bred, the reproductive rate decreases. What is the most likely reason for this? A) inbreeding depression
B) increased genetic variability
C) random mutations
D) heterozygote advantage
A
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In the human digestive system, the stomach produces about 2 liters of HCl and other gastric secretions every day. The acid secretion of the stomach
A. promotes a high pH. B. is stimulated by gastrin. C. begins the process of starch digestion. D. stimulates the gallbladder to contract. E. inhibits pepsin activity.
What is the reproductive organ of angiosperms?
A) Cones B) Flowers C) Seeds D) Fruits
What is the mechanistic theory?
a. Cancer spreading is determined by the pattern of blood flow b. Fertile environment in which compatible tumor cells could grow c. Age and gender determines the spread of disease d. None of the above
Who is my best friend?
a) Brittttttanyyyyyyyy KERRRRRYYYYYY b) Yooooogiiiiiiiii c) Both a and b are correct d) None of the above