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

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

Which of the following would you not find in a bacterial cell? dna cell membrane golgi apparatus ribosomes

Select the correct answer from each drop-down menu the images show fossils of a modern bird and two extinct organisms (a tyrannosaurus rex and an archaeopteryx). based on the structure of the three organisms, it can be concluded that the archaeopteryx and bird have wings, while dinosaurs have limhe se it can be concluded that