In 1898 friedrich loeffler and paul frosch found evidence that the cause of a highly contagious hoof and mouth disease in livestock was a microscopic infectious particle it was discovered that this particle requires a host cell to reproduce

Ashort, vertical, solid, or fleshy stem possessed by gladiolus and which is used in reproduction is termed a

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.

The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.