In studying the dance of the honeybees, Karl von Frisch determined the duration of dance conveyed the ____ of the

food and the angle of the dance conveyed the ____ of the food.



a. direction; distance
b. distance; direction
c. type; direction
d. direction; type
e. distance; type


ANSWER: b

Biology & Microbiology

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Why are genes associated with nitrogen fixation not typically used to identify bacteria species? (Select all correct choices.)

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Coarse-textured soils have a low field capacity and a low wilting point

Indicate whether the statement is true or false

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Which of the following does not apply to eukaryotic gene regulation?

A) gene regulation by attenuation B) regulation as a result of compartmentalization C) mRNA degradation (turnover) D) protein degradation (turnover) E) protein folding

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In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A lethal recessive allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?

A) 2:1 male to female B) 1:2 male to female C) 1:1 male to female D) 4:3 male to female E) 3:1 male to female

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