Cephalochordata is the subphylum that retains all chordate characteristics, even in the adult forms.
The correct answer is B. Prokaryotes do not have a nucleus.
Explanation:
In biology, the Prokaryotes along with the Eukorytopes are types of cells. In the case of the Prokaryotes these cells are found in bacteria and similar organisms different to Eukaryotes, Prokatyoes do not have a nucleus, lysosomes or Golgi complex. But they have cell walls which are only found in certain Eukorayotes cells and as most cells they Prokaryotes also have cytoplasm. This implies in the case presented the student should not have selected "has genetic material found within a nucleus" as a feature that identifies a cell as prokaryote as these do not have a nucleus and therefore the reason Mrs. Hines should mark the student's answer incorrect is Prokaryotes do not have a nucleus.
Vasodilation have positive effects on the afterload and blood pressure.
<h3>What effect does vasodilation have on the afterload? </h3>
Vasodilation have positive effects on the afterload because afterload goes down when aortic pressure and systemic vascular resistance decreases through vasodilation.
<h3>What effect does vasodilation have on blood pressure?</h3>
Vasodilation is a mechanism which occurs in order to enhance blood flow to areas of the body that are lacking oxygen and nutrients. The vasodilation causes a decrease in systemic vascular resistance (SVR) and an increase in blood flow that results in reducing blood pressure.
<h3>How will her body try to bring her blood pressure back to homeostasis?</h3>
Her body try to bring her blood pressure back to homeostasis by increasing width of the blood vessels.
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Answer:
Phosphorylation
Methylation
Explanation:
Histone mobilization deals with the covalent bonding of several functional groups to the free nitrogens in the R-groups of lysine in the N-terminal tail.
DNA transcription can be controlled or altered via 'methylation' on the histones. Methylation is the mode of transferring methyl group to amino group of histone proteins that form the nucleosomes, which result to chromosomes formation through wrapping of DNA double helix around it. Histones methylation can either increase or decrease genes transcription. Chromatin modification is known to stimulate neural pathways that are essential for long memories and learning.
Histones phosphorylation is associated transcriptional activation. It deals with the transfer of phosphate group to amino acids of the proteins. Phosphate group known to be negatively charged, when transferred to amino acids of the histone proteins, it creates a repulsive force with the negatively charged phosphates of the DNA backbone. It can occur in serine, tyrosine and threonine. The enzymes kinases activate phosphorylation, while protein phosphatases remove phosphate groups.
