Which theory states that all organisms are made up of cells that are capable of self-reproduction and come only from preexisting living cells?

a. Atomic theory
b. Cell theory
c. Abiogenesis theory
d. Germ theory


Answer: b. Cell theory

Biology & Microbiology

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A nonliving object that can spread infection is a ________

Fill in the blank(s) with the appropriate word(s).

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As the global concentration of carbon dioxide increases, there is great potential for direct impact on the world's

A. climate. B. biogeochemistry. C. ozone layer. D. biodiversity.

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Based on diversity, life is divided into Bacteria, Archaea, and Eukarya. These groupings are called ______.

A. protists B. eukaryotics C. domains D. kingdoms

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The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called

A. primer RNA. B. transfer RNA. C. messenger RNA. D. ribosomal RNA. E. ribozymes.

Biology & Microbiology