Whose work on spontaneous generation first demonstrated the existence of a very heat-resistant form of bacteria that are called endospores?
A. Pasteur
B. Redi
C. Tyndall
D. Schwann
Answer: C
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Phosphorus reservoirs include
A) phosphate minerals in rocks, dissolved phosphates in aquatic environments, and the nucleic acids and phospholipids of living organisms. B) mineral phosphonates and the nucleic acids and phospholipids of living organisms. C) elemental phosphorus minerals and phosphonates. D) elemental phosphorous, polyphosphate, and phosphonates.
Which number identifies the site where the transcriptional complex begins to form?
a. 1 b. 2 c. 3 d. 4 e. 5
Which two groups of protists produce hard, mineralized skeletal structures or cell walls that contribute to marine sediments and form fossils?
A) green algae and brown algae B) foraminiferans and radiolarians C) dinoflagellates and diatoms D) cellular slime molds and water molds
________ produces short sequences of RNA, which allows polymerase to synthesize a new strand of DNA.
A. DNA polymerase B. DNA helicase C. DNA topoisomerase D. DNA primase E. DNA ligase