The periodic table was developed in order to group and organize elements with similar physical and chemical properties. elements such as fluorine, chlorine, and iodine all are very reactive and only need one more electron to fill their outer shells. which of these best describes this family of elements? a) halogens b) noble gases c) alkali metals d) alkaline earth metals

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

Why is excretion necessary to maintain homeostasis?

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.