The concept of a species was proposed by

A. Charles Darwin.
B. John Ray.
C. Carolus Linneaus.
D. Erasmus Darwin.
E. George Cuvier.


B. John Ray.

Biology & Microbiology

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Eight hundred million years ago, what change in atmospheric conditions coincided with an increase in eukaryotic diversity?

A. decrease in CO2 B. increase in O2 C. increase in sulfur D. None of these choices are correct.

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The observable characteristics of an organism are called its ___________

A. Phenotype B. Genotype C. Dominance D. Genes E. None of the answers are correct

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Creative destruction is motivated by a desire for higher profits

Indicate whether this statement is true or false.

Biology & Microbiology

If you toss a coin and it comes up heads 73 consecutive times, what is the probability that it will come up heads on the 74th toss?

A) 1 B) 1/2 C) 0 D) 73/74 E) 1/74

Biology & Microbiology