RNA molecules are produced during transcription, the molecules being the ribonucleotides of mRNA
b
I am not that sure but I think endocrine cell don't contain blood vessels
Explanation:
Homologous chromosomes are two pieces of DNA within a diploid organism which carry the same genes, one from each parental source.
In simpler terms, both of your parents provide a complete genome. Each parent provides the same 23 chromosomes, which encode the same genes. So, our cells carry 46 total chromosomes, in two copies. However, each homologous chromosome can provide a different version of each gene. Two versions of each gene create more variety, lower the detrimental effects of negative mutations, and generally stabilize a population.
I hope it's helpful!!
The best answer would be "research reasons why species change over long periods of time"
if not i apologize but this is my best guess<span />
