Nucleic acids refer to DNA and RNA. In eukaryotic cells, the majority of DNA is found in the nucleus, with a small amount of mitochondrial DNA in the mitochondria.
It is believed that this happens because some signals that regulate development are the same between different species and because <span>they share ancient genes. </span>These ancient genes are expressed during a middle "phylotypic stage" of embryonic development for all species.
For example, human and animal embryos go through very similar stages of early development and share similar features such as tails and gill-like structures. The major difference appears to be how long it takes to reach each of these same stages.
D for sure. Just like how the ground rises over millions of years.
DNA is called antiparallel because it’s a double helix = 2 strands that run in opposite directions! 1 strand goes in the direction of 5’ -> 3’ & the other strand goes in a 3’ -> 5’ direction
