What does mitosis do that the cell would do wrong if it just split down the middle in cell division

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

If 360 joules of work are needed to move and create a distance of 4 m what is the weight of the crate