Which one of the following elements is found in non-living systems but not found in more than trace amounts in living systems?

A. calcium B. carbon C. hydrogen D. oxygen E. silicon


Answer: E

Biology & Microbiology

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Which process is responsible for the evolution of mitochondria and chloroplasts in eukaryotes?

a. endosymbiosis b. conjugation c. transformation d. transduction

Biology & Microbiology

Choanoflagellates are ____

a. heterotrophs b. chemoautotrophs c. autotrophs d. phototrophs e. halotrophs

Biology & Microbiology

In Figure 8.2, base 2 is attached to

A) ribose. B) phosphate. C) deoxyribose. D) thymine. E) The answer cannot be determined based on the information provided.

Biology & Microbiology

Which phenotype is maintained at a relatively high level within a population that is in a balanced polymorphism? a. Pp b. None of these phenotypes would be maintained in a balanced polymorphism

c. All of these phenotypes will be maintained in a balanced polymorphism. d. PP e. pp

Biology & Microbiology