In the structural organization of many eukaryotic genes, individual exons may be related to which of the following?

A) the various domains of the polypeptide product
B) the sequence of the intron that immediately precedes each exon
C) the number of polypeptides making up the functional protein
D) the number of start sites for transcription

Free brainliest! what is a characteistic of the american stradfordshire?

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

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.