Both the RNA-first and the protein-first hypotheses must propose a manner for DNA to become the genetic material as it is today.
Answer the following statement true (T) or false (F)
True
How the first cell acquired both DNA and enzymatic proteins is an issue for both the RNA-first and the protein-first hypotheses.
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Which of the following is NOT true of
protists?
a. They may reproduce sexually. b. Most have mitochondria. c. Some reproduce asexually by binary fission. d. Most protists are unicellular organisms, but some are multi-celled species. e. Some protists are photoautotrophs
The Cenozoic is often referred to the age of all of the following EXCEPT:a
insects. b. mammals. c. flowering plants. d. birds. e. reptiles
What is evolution?
A) a rare event B) a process that is constantly occurring at the same rate in all organisms C) a process that occurs as a result of differences in reproductive fitness D) a process that occurred only in the past
Which of the following reagents reacts with crystal violet as the mordant?
A. safranin B. crystal violet C. Gram's iodine D. 95% ethyl alcohol