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

Biology & Microbiology

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A regulon always includes at least two operons

Indicate whether the statement is true or false.

Biology & Microbiology

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

Biology & Microbiology

Compound eyes are composed of independent visual units called  

A.  apposition segments. B.  ocelli. C.  ommatidia. D.  retinas. E.  simple eyes.

Biology & Microbiology

The ABO blood types have ____ different genotypes

a. 4 b. 6 c. 8 d. 12 e. 16

Biology & Microbiology