Fossil stromatolites are evidence that cells exited 3.5 million years ago
_____________ Indicate whether the statement is true or false.
False - billion
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A blood pressure reading of 140/90 would be considered good for a healthy 20-year-old male.
a. true b. false
The ability to process information from the environment _______________
A. is a trait unique to multicellular organisms B. is a trait unique to eukaryotes C. requires a brain and spinal cord D. is characteristic of all types of organisms E. is unique to primates
There are five antibody classes: __________, __________, __________, __________, and
__________. (Ig stands for __________.) Fill in the blank(s) with the appropriate word(s).
In the 1920s, Aleksander Oparin and John Haldane each made independent proposals about the formation of life on Earth. What did they say about essential organic molecules?
a. that these could not have been made in the absence of life in the conditions on primordial Earth b. that these could have been made in the presence of life in the conditions on primordial Earth c. that these could have been made in the absence of life in the conditions on primordial Earth d. that these could have been made in t