Answer:
Your lungs can be very badly affected by smoking. Coughs, colds, wheezing and asthma are just the start. Smoking can cause fatal diseases such as pneumonia, emphysema and lung cancer. Smoking causes 84% of deaths from lung cancer and 83% of deaths from chronic obstructive pulmonary disease
Explanation:
Answer:
B) signals the exocytosis of the neurotransmitter.
Explanation:
The arrival of action potential at the presynatic neuronal membrane caused the influx of Ca+ into the presynaptic neuron, This leads to the migration and fission of acetycholine neurotransmitter contained vesicles to the tips of the presynaptc neurons, and eventual emptying into the synaptic cleft by exocytosis.
Thus it is the influx of Ca+ which stimulated the migration and emptying of the acetycholine neurotransmitters by exocytosis.
The acetycholine binded with the receptors on the post-synaptic neuron for action potential to generate in the post synaptic neuron as IPSP or EPSP
Answer:
<h2>Earth's core.</h2>
Explanation:
<h2>hope this is useful </h2>
Answer:
B.chickens are more closely related to ducks than they are to humans.
Explanation:
Amino acids are coded for by codons.
Codons are sequence of nucleotide bases from mRNA.
mRNA are synthesized using DNA templates.
Therefore, the more similar the amino acid sequence of two organisms, the more genetically related the organisms are.
<em>Chickens and ducks had amino acid sequence of 3 while chickens and humans had 13. It thus means that chickens and ducks are more related as compared to chickens and humans.</em>
The correct option is B.
Answer:
New cells are naive to the infectious cells who attack it or they are not well prepared to deal with the different scenarios. But, the cells who are attacked before has the set or sequence of the viral or bacterial genome strand been identified by them, which leads to more safety or protection from these foreign bodies.
Explanation:
- Mechanism To attack a host cell:
The viruses and other infectious material enters and attacks the host cell, by breaching its membrane wall and installing or leaving a gene of its own inside the cell. Which then combines with the genome of the cell and it goes through the process of replication, translation etc,along with the host cell machinery. Which then spreads the specific gene strand more in the environment
- <u>Camouflage obtained by the infectious cell to hide it self:</u>
After the genome enters the host cell at first it does not recognizes the strands or foreign cells, as they cover there body with a camouflage sort of membrane and they look more like the body cells.
- <u>Reactions by the host cell and as a whole the body:</u>
The organisms detects the genome of the infections cells or strand, as they store the data about it in its server or database. As if the next time they were under attack then precautions will be there by the host cell to deal with it.
As for the cell who are never attacked before will be less safe to deal with these foreign bodies.
