Questions by Jhonatan Sabadi

Questions by Jhonatan Sabadi

Doctors have fought infections with penicillin for over 50 years. Recently, penicillin has not worked as well as before. Which of the following explanations can account for this observation?

asked Jul 25, 2018

1 answer

0 votes

95.7k views

Which is a property that can be used to identify matter? element softness density all of the above

asked Dec 10, 2017

1 answer

0 votes

137k views

Natural selection states that a. a change in a species occurs over time. b. nature selects the variations within a species that are most useful for survival. c. ﬁtness is an organism’s ability to survive

asked Apr 21, 2015

1 answer

0 votes

88.1k views

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