Topics: Corona Quiz
Washing your hand is considered to be one of the very best defenses you can take to be prevent the spread of the Virus . It is recommended that you wash your hand for at last….
A. 10 Seconds
B. 20 seconds
C. 30 Seconds
D. 40 Seconds
Select your answer:
Topics:
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Reproductive System Vocabulary › ViewAn embryonic stage in which the three basic tissue germ layers form
A. blastocyst
B. fetus
C. gastrula
D. placenta
Enzymes › View
Why do extremes of pH cause a drop in enzyme activity?
A. They increase the activation energy
B. They decrease the concentration of substrates
C. They can denature the enzyme
D. They change the temperature