Which supports the hypothesis that life has changed over time? a. the atmosphere from today and years ago is different. b. the length of a giraffe's neck is longer than those in generations of the past. c. prokaryotic and eukaryotic cells differ in that both do not have a nucleus. d. organisms differ from each other around the world.

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium

Will mark you as ! keiko’s teacher was discussing the theory of endosymbiosis. she asked keiko to mark the organelles in the diagram that most closely resembled prokaryotes. which organelles should keiko mark? * the first image is the question and the second image is some information to you answer the !

The relationship between intron and exon