[ Vocabulary ]
features that make organisms different from one another
A. characteristics
B. variation
C. behavioral variation
D. physical variation

Random Topics:
HomophonesModals Posibility and ProbabilityPronouns/ Present TenseModals and Present TensesPast and Past ContinuousInfinitive and GerundsComparison and ModalsGrammar and PunctuationModals and Active and Passive VoiceEs and SOther quiz:
Grammar › ViewAllow me to be the first to _________ your stunning achievement.
A. tell you
B. congratulate you on
C. mention to you
Vocabulary and Idioms › View
My grandfather died because of the war. However, his great spirit was _________ for all generations.
A. given down
B. handed down
C. hold down
D. went down
Grammar › ViewIn recent years there has been a large increase ………….. the number of people who take no regular exercise.
A. of
B. in
C. for
Conjunction › View
I was having a nice time here, ……. I decided to stay longer.
A. because of
B. because
C. therefore
D. due to
