Anew bacterial life form is discovered on mars. the meselson and stahl experimental protocol is used to determine the mode of dna replication in this species. the bacteria is grown first in heavy nitrogen (15n) and then switched to 14n, and then centrifuged. it is discovered that dna replicates via the conservative mode of replication in this species. what experimental results led to this conclusion?

Select all the correct answers. which statements fail to meet the requirements of a scientific claim? 1 even though evidence indicates that the solar system's planets follow elliptical paths, copernicus's model involving circular orbits is true. 2 the evidence supporting newton's laws of motion was accurate in newton's time, but the universe operates differently today. 3 flowers that reflect the most ultraviolet light are more likely to attract bees and other pollinators than flowers that reflect less ultraviolet light. 4 in the final 100 meters of a 10,000-meter race, an athlete's speed is more strongly related to anaerobic efficiency than to aerobic efficiency.

What is a group of organisms that are closely related and share similar characteristics

What kinds of molecules can pass through the cell membrane without any problem?