Met Pro Val is the answer
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.
Answer:
legumes are able to form a symbiotic relationship with nitrogen-fixing soil bacteria called rhizobia.The result of this symbiosis is to form nodules on the plant root,within the bacteria can convert atmospheric nitrogen into ammonia that can be used by the plant
Plants respond to disease with their immune system.
So, the correct answer is A.
Hope this helps,
Davinia.
Determination of age if the fossils may help in determining the ancestry of these fossils, and their linked evolution. Radiometric dating is used to measure the radioactive decay of the sample and can be used for estimating the fossils of more than 50 million of years. Stratigraphy can also be used for studying the layers of the fossils. All the techniques covered in the study of fossils, fall under the category paleontology.
