Which phrase best summarizes the theory of evolution by natural selection?
a. only the strongest animals survive.
b. life must come from other life.
c. populations change over long periods of time.
d. parent organisms pass on traits they have acquired during their lifetime. question resources

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

The body is protected against harmful flu viruses by

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