Answer:
The cell organellles are visible in the electron microscope, but it is not possible to study the living cells in electron microscope. For study of genetic materials i.e., DNAs and RNAs is poosible through the help of electron microscope. (ANSWER)
Explanation:
Answer:
Here are some explanations from 0nline so if you want rewrite in your own words
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blood glucose-
"The control of blood sugar (glucose) by insulin is a good example of a negative feedback mechanism. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas) secretes insulin into the blood effectively lowering blood sugar levels."
"If the blood glucose level is too low, the pancreas releases the hormone glucagon. This travels to the liver in the blood and causes the break-down of glycogen into glucose. The glucose enters the blood stream and glucose levels increase back to normal. This is an example of negative feedback."
body temperature-
" Body temperature is regulated by negative feedback. The stimulus is when the body temperature exceeds 37 degrees Celsius, the sensors are the nerve cells with endings in the skin and brain, the control is the temperature regulatory center in the brain, and the effector is the sweat glands throughout the body."
"Body temperature is controlled by the hypothalamus in the brain. If the hypothalamus detects that the body is too hot, the response is that the body begins to sweat to try and reduce the temperature back to the correct level."
"Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances."
"Negative feedback brings a system back to its level of normal functioning. Adjustments of blood pressure, metabolism, and body temperature are all negative feedback"
Characteristics
such as
<span><span>
1.
</span>Irritability.
Organisms react to certain stimuli in their habituated environment in order to
survive.</span>
<span><span>
2.
</span>Reproduction.
This is the natural mechanism of living organisms to produce offspring or seeds
for the next generation.</span>
<span><span>
3.
</span>Growth.
Every organisms undergoes the process of development and growth, where they
become for capable in survival.</span>
<span><span>4.
</span>Excretion.
As living organisms utilize the natural resources and undergoes bodily
processes, waste is created and is toxic which is needed to be out of the
system.</span>
<span><span>5.
</span>Movement.
Survival means being able to adapt and move to a certain location where you can
grow and hunt.</span>
<span><span>6.
</span>Respiration.
All organisms –fish, reptiles, mammals, or even algae undergoes cellular
respiration in order to do its functions.</span>
<span><span>
7.
</span>Nutrition.
Living organisms need food and for the plants, make food in order to function. </span>
E. coli belongs to the genus Escherichia
Taxonomically, <em>Escherichia coli </em>is categorized as belonging to the phylum Proteobacteria, class Gammaproteobacteria, family Enterobacteriaceae, order Enterobacteriales, and genus Escherichia (named after its discoverer, Theodor Escherich).
- Escherichia coli (E. coli) are typically found in warm-blooded organisms' lower intestines. The majority of E. coli strains are not harmful, but some can seriously poison food.
- A Shiga toxin-producing E. coli (STEC) is capable of causing severe foodborne illness.
- Raw or undercooked ground meat products, raw milk, and fecal contamination of vegetables are the most common causes of STEC outbreaks.
- The illness is usually self-limiting, but it can progress to a potentially fatal condition like haemolytic uraemic syndrome (HUS), especially in young children and the elderly.
know more about E. Coli here:brainly.com/question/8782363
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Whereas apoptosis is a form of cell death that is generally triggered by normal, healthy processes in the body, necrosis is cell death that is triggered by external factors or disease, such as trauma or infection. Apoptosis, which can also occur as a defense mechanism during healing processes, is almost always normal and beneficial to an organism, while necrosis is always abnormal and harmful. Though necrosis is being researched as a possible form of programmed cell death (that is, a sometimes natural process), it is considered an "unprogrammed" (unnatural) cell death process at this time. As a usually healthy form of a cell's life cycle, apoptosis rarely demands any form of medical treatment, but untreated necrosis can lead to serious injury or even death.
