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laila [671]
2 years ago
12

Most hypotheses state that prokaryotic anaerobes probably evolved first. Why?

Biology
1 answer:
Whitepunk [10]2 years ago
6 0

Answer:

Oxygen was not present on early earth

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Smart growth is an urban planning theory that promotes the development of suburbs surrounding major city centers.
Lelu [443]

Answer:

False.

Explanation:

  • Smart growth is an urban planning and transportation theory that shows the growth in urban centers and avoids urban sprawl.  
  • It also promotes transit-oriented and bicycle-oriented land use and this term is mostly used in North America, U.K, and describes the concept that shows governmental planning and it values the long ranges, regional considerations of sustainability over the short term focus.
  • <u>Other concepts include sustainable development, resource stewardship, sustainable transport, land preservation, and preservation development.</u>
7 0
2 years ago
2. An adaptive advantage of having a three-chambered heart, as found in amphibians, over the two-chambered heart of fish is that
Nadya [2.5K]

Answer:

fully oxygenated blood returning to the amphibian heart can undergo additional pumping to reach higher pressures.

Explanation:

Fishes have a two-chambered heart with one atrium and one ventricle. The blood is pumped from the atrium into the ventricle. Ventricle pumps blood into a single circuit of blood vessels. Blood is oxygenated as it passes through capillaries in the gills. As blood circulates through the gill capillaries, it has low blood pressure and therefore, is delivered very slowly to the other organs.  

The amphibian heart has two atria and one ventricle. A sinus venosus collects oxygen-poor blood and pumps it into the right atrium. Oxygenated blood from the lungs passes directly into the left atrium. The left atrium pumps the oxygen-rich blood into the arteries that conduct it to the various tissues of the body. Therefore, a three-chambered heart in reptiles allows the delivery of oxygenated blood with high blood pressure.

6 0
3 years ago
Can you guys explain how lipase helps in cleaning action ?​
mash [69]

Answer:Тhey help to break down food so that we can absorb the nutrients within. As specialists in their fields, each one has a specific role to play in stain removal. Lipases are responsible for breaking down oils and fats whereas proteases break down protein and starch, such as blood and gravy.

7 0
3 years ago
In a car accident, a person sustained major trauma to his brain and the spinal cord region of his neck. damage, in this case, wa
cricket20 [7]

Hello there

the answer is central nervous system

Hope this helped best regards Queen Z

6 0
3 years ago
Which of these bests explains the difference between the way animals and plants exchange gases with their environments?
Marizza181 [45]
Answer: Animals use only respiration, while plants use both photosynthesis and respiration.
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