The pia meter is the thin meninx attached to the surface of the brain, containing many nerves and blood vessels.It is <span>the delicate innermost membrane enveloping the brain and spinal cord. Hope this answers the question. Have a nice day.</span>
Answer:
Positively charged ions
Explanation:
Histones are a group of proteins with a N-terminal end of an amino acid, that binds to the DNA in the nucleus helping it to condense into Chromatin. DNA wraps around a core of proteins to initially form the NUCLEOSO ME structure, which is the basic subunit of Chromatin. Each nucleosome is made up of DNA coiled around two copies (2) of proteins- H2A, H2B, H3 and H4, to form a set of eight proteins called histone octamer.
Due to the phosphate group (PO4-) embedded in the DNA molecule, they assume a negative charge. The positively charged ions of the N(C) terminal end of histones which arise from the amino acid group they contain allows it to bind tightly to negatively charged DNA i.e. the more positively and negatively charged the histone and DNA are respectively, the tighter the binding.
Due to this property, the proteins that binds to DNA in E.coli, should possess a positive charge in similarity to histones in eukaryotes.
<span>The best describes the first reaction the neuron has is </span>Ions flow into the neuron.
When a neuron sense a stimulus, it will open ion canal and allow ion to flow into neuron causing a change in membrane potential. This will activate a cascade of reaction which needed to sent message to other neurons.
Reproductive success will decrease as there will be a skewed number of males and females.
1 is correct for photosynthesis
2 is coreect for cellular respiration
3 is correct for photosynthesis
4 is correct for respiration
all of the statements are correct
