Blake and Angel are scientists. Blake studies how plants grow. Angel studies how to build things. Why do Blake and Angel use different kinds of investigations? A. because they made a mistake B. because they do not like each other C. because they study the same things D. because they are asking different questions the answer is D

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

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How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?