One possible explanation for the fact that some simple, one celled organisms did not even evolve into complex multicellular organisms is that
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Answer 1
Answer:
The answer is that they have traits that enabled them to survive in a changing environment.
During the evolution of the Earth, and later during the evolution of life, the environment was not constant. Change in the environment could lead to an extinction of some species. But, some species were able to adapt or could tolerate a wide range of environmental factors. One of the explanation, why unicellular organisms did not evolve into complex multicellular organisms is because they have traits that help them to tolerate the wide range of factors, and thus, survive in changing environment.
A limiting factor is something that restricts organism(s) from increasing their population. If you look at a graph showing the population of a certain organism, you will notice that at a certain amount of their population it stays around the same area. That is known as the carrying capacity. The carrying capacity is there due to the limiting factors, which depends based on the needs of particular organisms. For example, one limiting factor for a certain species might be that the number of predators increased, or there are limited resources available in order to survive.
Prevents species from growing, example food
What chemicals are in cigarettes
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Cigarette smoke contains over 4,000 chemicals, including 43 known cancer-causing (carcinogenic) compounds and 400 other toxins. These cigarette ingredients include nicotine, tar, and carbon monoxide, as well as formaldehyde, ammonia, hydrogen cyanide, arsenic, and DDT. Nicotine is highly addictiv
there are many but I will give you the top ten dangerous chemicals.
1. Benzene
Benzene is a compound(you can say chemical) that most likely to cause leukemia (blood cancer). Benzene is commonly used in gasoline and pesticides. Smoking a cigarette would expose half of the benzene in that 1 cigarette.
2. Formaldehyde
This is a disinfectant that kills all microbes and is used to preserve dead bodies. Amongst a lot of other problems, it causes eye irritation and coughing problems. But there's more about this, Formaldehyde can affect not just the smoker himself, but people near around the smoker.
3. Tar
Yes, the same thing that is on every single road. Tar is the residue produced by the burning tobacco. The chemicals produced cause cancer and the residue id the result of the yellow teeth due to smoking
4. Arsenic
One of the most dangerous compounds, arsenic can cause cancer as well as damage the heart and its blood vessels. Over time, it accumulates in a smoker's body. It even worsens the effect of other chemicals by interfering with our body's ability to repair our DNA and giving us a longer, healthier life.
5. Cadmium
Did you know you also smoke that compound that is used to make batteries? This toxic metal not only causes cancer but also damages kidney as well as the linings of the arteries!
6. Chromium
Blame chromium for letting carcinogens stick to the DNA and damage it completely. Chromium is also used for making dye, paints, and metallic alloys, and hence inhaling this also causes cancer. Now you know why smoking can kill you.
7. Hydrogen Cyanide
This compound increases the risk of cancer by damaging cilia. Cilia is a (tiny hair-like substance that lines the airways and helps clear toxins away. If cilia gets destroyed, the lungs become more vulnerable and more toxins easily enter the air passage.
8. Carbon Monoxide
Who knows not about the harmful effects of Carbon Monoxide? A colorless, odorless gas, CO makes up to 3-5 percent of tobacco smoke. It sticks to the red blood cells instead of oxygen, as a result of which, the amount of oxygen transferred gets lowered, thus harming our respiratory system.
9. Nitrogen Oxide This gas is a major air pollutant and causes inflammation of the lungs. The problem is when a particular person is not smoking, the internal nitrogen oxide production shuts down. That's the reason why regular smokers mostly suffer from heavy breathing. 10. Ammonia
Remember that strong ammonia smells in the Chemistry lab that almost made you faint? Yes, that's the chemical found in cigarettes too. This is the chemical that is responsible for enhancing the most addictive nature of nicotine, which is also commonly used as a toilet cleaner. Still, think smoking is cool? Look up at people's mistake smoking a pack. My Grandad was rushed to the hospital because he was a smoker. Cigarettes can ruin your life and your family.
Hope this helps...
How do viruses differ from bacteria, fungi, and parasites?
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Viruses are added to the microorganisms group, but not all researcher agree that are living organisms. This is because outside of a living cell are viruses are inert. A very important difference in comparacy to bacteria, fungi and parasites is that viruses have ONLY one type of nucleic acid (DNA or RNA, never both).
Behavioral adaptationI need a animal with a special behavior. Than I need to know how does its behavior help the animal.
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the behavior helps the animal because its what helps them to survive , mate , and even help reduce societal problems
an animal with a special behavior could be a bear... its behavior being hibarnation, which helps the bear sleep during the winter
how do birds identify members of the same species a. Methods of sharpening beaks b. Migration patterns c. Producing a distinct call d. Hunting in packs
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The answer is C. It's kind of like how humans speak in different languages. So do birds. They may make different noises but they are all still birds.
Which of these is NOT an environmental effect of burning fossil fuels?A. increased carbon dioxide levels
B. habitat loss
C. increased temperature
D. acid rain
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i believe it would be B. habitat loss, it has no direct effect on habitats. but it may cause problems for the animals living in the surrounding habitat, from the other options. increase and temperature and carbon dioxide levels are dangerous for the surrounding environment, along with acid rain being a rare thing that can affect things