In the following figure, what does the straight line describe?
a. the resemblance of parents and offspring
b. the narrow-sense heritability
c. the proportion of the total variance explained by the additive variance
d. A and B
e. All of the above
E
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You begin an experiment with two populations of E. coli that are each composed of 100 cells. The cells are all genetically identical (i.e., they are clones)
You grow these populations in flasks on a lab bench under identical conditions with unlimited resources. Which of the following statements about the populations are true? ____ Natural selection begins operating immediately on the populations. ____ Initial differences in population will be adaptations to the new environment. ____ Initial differences in the population will be the result of sexual selection. ____ Initially mutation will be the only source of variation in the population. ____ Initially these populations will be in H-W equilibrium. ____ Speciation cannot occur because the two populations are identical. ____ After 100 generations both populations will still be genetically the same, having accumulated the same mutations over time. ____ Natural selection cannot occur because bacteria are haploid, so there is no individual variation. ____ Speciation can only occur after there is enough variation in the population for natural selection to act upon. ____ Speciation can occur between these populations through genetic drift alone. What will be an ideal response?
When graphing data, what scientific information do scientists plot on the x-axis?
A) independent variable B) dependent variable C) control D) sampling error
The outer layer of bone, referred to as ________, is dense and strong.
A. medulla B. spongy bone C. cortex D. compact bone
The effects of a transposition event are equivalent to a(n)
A. nonsense mutation. B. missense mutation. C. frameshift mutation. D. silent mutation. E. HFR conjugation.