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.
Biology & Microbiology
Based on diversity, life is divided into Bacteria, Archaea, and Eukarya. These groupings are called ______.
A. protists B. eukaryotics C. domains D. kingdoms
Biology & Microbiology
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