[ Vocabulary ]
difference in the body structures of organisms in the same population
A. characteristics
B. variation
C. behavioral variation
D. physical variation

Random Topics:
Modals: Possibility, Necessity, ExpectationPassive VoiceVocabularyModals with Perfect InfinitiveAlthough / DespiteSubordinate ConjunctionsPunctuation and GrammarComparative AdverbsPrepositionPositive and Negative ConnotationsOther quiz:
Grammar › ViewWhat does a cheetah look like?
→It looks like a big, ____________ cat.
A. bright
B. spotted
C. soft
D. clear
Modals › View
How would you politely request to borrow a book?
A. Can I have this book?
B. May I borrow this book, please?
C. I ought to use this book?
D. If I could only borrow this book for a short period?
Grammar › ViewSome people say that ________ are just friends you haven’t met yet.
A. peers
B. strangers
C. coaches
D. colleagues
Grammar › View
Where______ you______ when I______ you on the bus last night?
A. did / go / saw
B. were / going / was seeing
C. were / going / saw
D. did / go / was seeing
