Dmitry Mendeleev arranged all the elements by ________ in the periodic table so elements in the same ________ behave in similar ways
a. number of neutrons / column
b. mass number / row
c. number of electrons / row
d. atomic number / column
d
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A regulon always includes at least two operons
Indicate whether the statement is true or false.
Golden collared manakin birds perform an elaborate mating dance that includes jumping on perches and repeatedly hitting their wings together to make a popping noise
Data suggest that females select the fastest jumpers and those that make the popping noise more rapidly for mating. The __________ is the mechanistic explanation of this behavior; the ___________ is the adaptive function of this behavior. A. mate choice; ability to jump B. ability to jump; mate choice C. female evaluation of the behavior; ability to jump D. ability to jump; female evaluation of the behavior
Compound eyes are composed of independent visual units called
A. apposition segments. B. ocelli. C. ommatidia. D. retinas. E. simple eyes.
The ABO blood types have ____ different genotypes
a. 4 b. 6 c. 8 d. 12 e. 16