Which one of the following is not a component of a nucleosome core particle?
A. histone H4
B. approximately 150 base pairs of DNA
C. histone H2B
D. ribosomes
E. histone H3
Answer D
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Which type of plant hormone would be used by commercial grape growers to get larger grapes by
lengthening the stem on which fruits develop?
a. abscisic acid b. ethylene c. auxins d. salicylic acid e. gibberellins
Under what circumstance might two loci be on the same chromosome but behave as if independently assorting in crosses?
What will be an ideal response?
Which of the following is a common source of heavy metals introduced into natural ecosystems?
A) refuse from mining and smelting operations B) waste products of manufacturing processes C) fungicides D) by-products of burning of leaded fuels E) all of the above
Which of the following is an appropriate interpretation for these graphs?
Maternal care (as measured by minutes crouching over offspring and proportion of pups retrieved) in female mice that have the fosB allele is
A. not possible to determine from the data. B. the same as the maternal care given by female mice without the fosB allele. C. less than the maternal care given by female mice without the fosB allele; however, the graphs depict only minor differences, which are most likely not significant. D. less than the maternal care given by female mice without the fosB allele. E. greater than the maternal care given by female mice without the fosB allele.