A portion of a DNA molecule wound around a spool of
histone protein is called a
a. centromere.
b. nucleosome.
c. spindle.
d. furrow.
e. cell cycle.
Answer: b
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An ecological ____ is the set of all populations found in a given place
Fill in the blank with the appropriate word.
Passive molecular diffusion occurs when ____
a. the energy of ATP is added b. random collisions between molecules occurs c. there are variations in molecular sizes d. enzymes catalyze their movement e. vesicles break off from the membrane
What is the best way to test a hypothetical evolutionary classification among living organisms?
A) analysis of embryonic development B) analysis of physical structures C) analysis of DNA sequence D) analysis of habitat
Interspecific competition occurs between members of the same species
a. true b. false