To estimate how much the means of a variety of like samples drawn from the same population might vary, which statistic is often used and what is its formula?
What will be an ideal response?
standard error of the mean; = s /
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If all of the variation in a trait in the population is due to differences in the environment, then the mean phenotype of the offspring would be independent of parental phenotype and would be identical to the mean phenotype of the population
A. true B. false
Bryophytes differ from other land plants in that they do not have
a. lignified water transport tissue. b. protected sporophyte embryos. c. spores. d. a gametophyte generation. e. a diploid generation.
Earthworms have a(n) ____
a. exoskeleton b. endoskeleton c. hydrostatic skeleton d. segmental skeleton e. squishy skeleton
All of the following statements about catalysts are true EXCEPT
A) catalysts increase the reaction rate. B) catalysts are not permanently altered during reaction. C) catalysts increase activation energy requirements. D) biological catalysts are specific enzymes. E) catalysts can be used repeatedly.