More cards in this set

Card 16

Front

When was antiseptic in general use?

Back

Preview of the front of card 16

Card 17

Front

When were the first x-rays?

Back

Preview of the front of card 17

Card 18

Front

When did Becquerel discover radioactivity?

Back

Preview of the front of card 18

Card 19

Front

When were blood groups discovered?

Back

Preview of the front of card 19

Card 20

Front

When did Flemming discover penicillin?

Back

Preview of the front of card 20

Card 21

Front

When was the structure of DNA identified?

Back

Preview of the front of card 21