a: animals evolved from simpler forms
Answer:
I know im late but for anyone seeing this in the future the answers are all exept the nervous system.
respiratory system
digestive system
endocrine system
excretory system
Explanation:
Answer:
The correct answer is ''can change over time in response to environmental cues, allowing genes to be turned on or off as needed.''
Explanation:
Histones are a family of proteins involved in compacting DNA into structural units called nucleosomes. Histone modifications occur in response to environmental conditions, and modulate the structure of chromatin, that is, they alter the structure of nucleosomes and therefore chromatin, and thus activate the transcription process, in which the chromatin is in the euchromatin state (loose conformation, in which the DNA information can be read), or "off" state, in which the chromatin adopts the heterochromatin conformation (compact conformation, which prevents reading), respectively. These post-translational modifications are mainly acetylation, methylation, phosphorylation, although there are many others. These make up the “histone code” that can change the expression pattern of some genes by modifying the chromatin structure, activating or silencing these genes.
<span>A photon of light is absorbed by a chlorophyll molecule. The photon increases the energy of an electron in the chlorophyll molecule, so the electron is boosted to a higher orbital. This excited state results in a redox reaction, in which the electron moves from the chlorophyll molecule to an electron acceptor, reducing it. The electron acceptor can be various different molecules such as chlorophyll A0.</span>
<span>Using biological information to make informed decisions</span>
