The parasympathetic exhaling nervous system is stimulated by blowing air out (PNS). The PNS controls the relaxation response, which helps us unwind, digest food, express ourselves, heal, and recover from traumas and trauma.
The exhaling nerve, which runs from the neck via the diaphragm to the brain, delivers a signal to your body to increase your parasympathetic nervous system and decrease relaxation sympathetic nervous system when your exhale is even a few counts longer than your inhale. Carbon dioxide lingers in the body and builds up in your cells, resulting in weariness, making you yawn, reducing mental clarity, and raising stress levels.
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The answer is; C
Recombination of genes is important in the variation of the organisms because it allows for novel allelic combinations during fertilization of gametes. Natural selection works best in a population with high genotypic and phenotypic variations. This increases the chances of survival of the population in case of climate change or calamities that cause a bottleneck effect.
The answer for this would b D
Answer:
If there is a mutation in the p53 protein then this leads to abnormal cell growth and cell death or apoptosis does not occur.
Explanation:
p53 is a tumor supressor protein.p53 is encoded by TP53 gene.The protein is named so because the protein has a molecular weight of 53 kilo Dalton and this protein helps in programmed cell death or apoptosis.
The mutation in p53 result in the abnormal cell growth due to accumulation of mutated p53 protein, an important sign of development of cancer.
Uhm... I believe you mean a situation when we examine a relation between two variables. In this case all other conditions must remain as constant as possible because they could affect a result and then the conclusions could be false. ie. you examine a relation between temperature and frequency of cell division/organism's activity, then you should stabilize air pressure, food composition, bacterial flora in experimental room... etc. of course when you conduct research in a field, ie. ecological research you can't do any of that but then you are obliged to explain possible aberrations of your results in an article's discussion.