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sharks, whales, and dolphins share similar features such as body shape and the position of fins. however, sharks have gills for breathing.
while whales and dolphins have lungs. these differences indicate that the organisms share a common ancestor for
whales also possess a vestigial pelvic bone. the presence of the pelvis bone may indicate that whales

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

What is the difference between an igneous, sedimentary and metamorphic rock

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur