The first cells were autotrophs Indicate whether the statement is true or false
False - heterotrophs
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A researcher knows that bacteria are much more prevalent in the seawater at the ocean's surface, compared to thaumarchaeotes. How does the ratio of bacteria to thaumarchaeotes compare at lower depths (5000 meters under the ocean's surface)?
A. Bacteria are still much more prevalent. B. Thaumarchaeotes are much more prevalent. C. There are roughly equal numbers of bacteria and thaumarchaeotes. D. Neither bacteria nor thaumarchaeotes can survive at that ocean depth.
Which of the following statements regarding the Watson?Crick model of DNA is not accurate?
A) It is the most common biological form. B) It is a left-handed helix. C) It is antiparallel. D) The bases are "stacked" in the center of the molecule. E) The backbone consists of alternating sugars and phosphates
The earliest evidence of biochemical reactions by living cells dates to about ____ billion years ago
a. 0.5 b. 1 c. 1.5 d. 2 e. 3.7
Which of these white blood cells gives rise to plasma cells, which can then produce antibodies?
A) T lymphocytes B) monocytes C) eosinophils D) B lymphocytes