Sometimes, the decline of one species threatens the survival of another species. Which scenario is an example of this?
A. Declines in polar bears result in diminished prey populations
B. The arrival of sailors on Mauritius island led to the extinction of dodo birds
C. Declines in eagle populations due to the accumulation of pollutants in their eggs
D. Decline in buffalo caused a drop in native buffalo clover
E. Pollution led to declines in the Texas blink salamander population
Answer: D
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Which of the following primates is the most closely related to humans?
A. gorillas B. orangutans C. monkeys D. chimpanzees E. lemurs
Individuals with hypothetical "thrifty genes" are proposed to be better at storing fat than individuals without these genetic variants.
Answer the following statement true (T) or false (F)
The inorganic nonprotein components that participate in enzyme catalysis are known as
A. products. B. coenzymes. C. substrates. D. cofactors. E. reactants.
An aligned pair of homologous chromosomes is called a
A) chromatid. B) spindle. C) tetrad. D) coenocyte. E) gamete.