Larger eukaryotes such as vertebrates contain much more noncoding DNA compared to smaller eukaryotes such as yeast. This means every time a vertebrate cell divides, it must spend more time and more energy replicating a large genome. What may this potentially high cost of having a bigger genome suggest about the selective pressures acting on organisms with smaller and larger genomes?

non-coding DNA sequences confer a key adaptive advantage associated with the ability to control a higher number of transcriptional programs  

Explanation:

A selective pressure can be defined as any type of external agent that affects an organism with certain genetic/phenotypic features, thereby exhibiting differential survival. Some examples of phenotypic selective pressure features include resistance to pollutants, diseases, illnesses, climate change, etc, while genetic selective features include, among others, a higher number of genes, higher non-coding DNA information, etc. Non-coding DNA sequences were originally thought to be selfish junk DNA without function. However, it has recently been shown that non-coding DNA sequences have critical regulatory roles, thereby it is expected that multicellular organisms with bigger genomes contain a higher amount of these sequences in order to modulate more transcriptional programs compared to organisms with smaller genomes, thereby being able to produce a higher number of cell types.

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

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