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lapo4ka [179]
3 years ago
8

According to the evolutionary theory of aging, why hasn't natural selection eliminated many harmful conditions and nonadaptive c

haracteristics in older adults?
Biology
1 answer:
Korolek [52]3 years ago
8 0
Evolutionary Theory of Aging describes t<span>he view that natural selection has not eliminated many harmful conditions and nonadaptive characteristics in older adults. N</span>atural selection is linked to reproductive fitness, which is present only in the earlier part of adulthood. According to evolutionary theory, possibly if some disease occurred earlier in development, it might have been eliminated many centuries ago.
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What environmental factor seems most critical to cellular respiration?
cupoosta [38]
Cellular respiration can be affected by several factors, among which we have to.
a, Breathing increases as temperatures increase and decrease as temperatures fall.
b. Oxygen is required for aerobic respiration to occur. If oxygen levels are reduced in the atmosphere, breathing slows down.
c. Soils saturated with water lack oxygen. In the absence of oxygen, breathing does not occur.
d. In low light conditions, plants produce less carbohydrates. Low levels of carbohydrates, in turn, mean low respiration rates.  
e. The stage of growth and the age of the plant influence the respiration rate necessary to maintain the processes of life. Young plants that grow actively tend to have a higher rate of respiration.  
f. Water is essential for cellular respiration and photosynthesis. Without water, the enzymatic activity stops. The plant essentially stops growing The lack of available water during drought conditions can cause the arrest of respiration. 
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4 years ago
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Hoochie [10]

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3 years ago
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What is the most poisonous spider in the world?
wel
According to Guinness World Records the Brazilian wandering spider (Phoneutria fera) is officially the world’s most venomous spider. It is capable of injecting a powerful neurotoxin which is nearly 20 times more deadly that of the Black Widow spider if it gets into the blood stream. That is as potent as the venom of many deadly snake species and the effects are similar. The symptoms of envenomation include a loss of muscle control leading to breathing problems which can result in complete respiratory paralysis and eventually asphyxiation.
But there are two other major side effects to the wandering spider’s bite; firstly there is intense pain and secondly, if you happen to be male there is the four hour hard on. Yes, you did read that correctly – the bite of the Brazilian wandering spider can cause an erection that lasts for several hours, unfortunately it is also painful.

In addition to the this deadly venom the behaviour of the wandering spider make it particularly dangerous to humans. As its name suggests the spiders are not confined to a web in a dark corner. In fact they like to turn up in all manner of hiding places; boots, piles of clothes, log piles, cars and bunches of bananas. Also known as ‘banana spiders’ wandering spiders have been known to hitch a ride across the globe in boxes of bananas. In one case a man in the UK was bitten after buying bananas in his local supermarket.

There is little doubt that these are dangerous spiders. Their aggressive nature and close contact with humans have resulted in a number of deaths over the years. In one tragic case a single spider was responsible for the deaths of two children in São Paulo. Fortunately an effective antivenom has been developed and there have been relatively few fatalities since.


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4 years ago
Give one example of how cooperation can help organisms survive
lubasha [3.4K]
Symbiosis
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