Which of the following statements is true? a. organisms which evolve in the same environment often have homologous structures. b. since there are gaps in the fossil record, it cannot be used as evidence for evevolution. c. human morphology and embryo development is very different from all other organisms. d. the more similar the embryonic development of two species, the more closely they are related

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 statement explains how gravity and intertia work together

What is the most abundant vertebrate on earth?