What chemical initiates the formation of acid mine drainage when pyrite is not disposed of properly?
A) O2
B) Fe2+
C) HS-
D) SO42-
Answer: A
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What is the most likely explanation for how a group of crocodiles acquired the trait in which lower incubation temperatures give rise to male crocodiles?
A. Horizontal gene transfer from a related species has introduced changes in this group’s genome. B. Horizontal gene transfer from a related species has introduced changes in this group’s proteome. C. One or more mutations in the genome have been passed through the group by vertical descent. D. One or more mutations in the proteome have been passed through the group by vertical descent.
Which molecules are the most important for a cell to protect from damage if the cell is to stay alive and reproduce?
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids
A torn tendon sidelines athletes for long periods of time because the tissues possess less vascular tissue than bone
Indicate whether the statement is true or false
Suppose two AaBbCc individuals are mated. Assuming that the genes are not linked, what fraction of the offspring are expected to be homozygous recessive for the three traits?
A) 1/4 B) 1/8 C) 1/16 D) 1/64