Who developed the modern endosymbiotic theory?
a. Charles Darwin
b. Lynn Margulis
c. Richard Dickerson
d. Wendy Johnson
e. Stanley Miller
ANSWER: b
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The earliest primates were:a
knuckle walkers. b. bipedal. c. brachiate. d. quadrupedal. e. arbore
_____ bonds link the sugar and phosphate groups in the backbones of DNA molecules
a. Covalent phosphodiester
b. Hydrogen c. Weak d. Ionic e. Weak covalent
There has been a lot of discussion about stem cell research in mainstream literature (i.e., newspapers and magazines). Stem c ells come from all of the following except:
a) umbilical cord b)embryos c) bone marrow d) Stem cells can come from all of these sources
The t-stat, a specific instance of a test statistic, is used to evaluate a null hypothesis concerning which population parameter of a random variable?
A. The size of the sample B. The variance C. The mean D. The r-squared