Answer:
Sulfate, nitrate, and ferric iron are readily available, exist in appreciable amounts, and act as terminal electron acceptors in anaerobic respiratory pathways.
If multiple electron acceptors existed before 575 million years ago, why do we not see evidence of complex multicellularity earlier in Earth's history?
a) The concentration of gaseous oxygen necessary for complex multicellularity did not occur until 575 million years ago.
Explanation:
There are many evolutionary hypotheses of the Earth´s environment billions of years ago, about how the different primitive electron-transport chains, an effective method for synthesizing the crucial individual components: ATP synthase, redox-driven H+ pumps, and photosystems, arose and survived in some very similar up-to-date bacteria, and in geological evidence, but although the first living cells on Earth are guessed to arise more than 3.5 × 109 years ago, the environment lacked oxygen, so the concentration of gaseous oxygen necessary for complex multicellularity did not occur until 575 million years ago:
Redox potential for NO3- -------> N2 = +0.740 Redox potential
It was until then that some bacteria developed H+ pumping electron-transport systems to take advantage of redox energy to maintain their internal pH.
Answer:
1. Light
2. production of large component from smaller components
Explanation:
In the given question, the meaning of the word Photo is light and the synthesis refers to the production and combining these words form photosynthesis. The literal meaning of photosynthesis will be the production of some compounds in the presence of light.
The word photosynthesis is used by the biologists to refer to a process taking place in the green plants which involve the light for the synthesis of energy-providing molecule glucose.
Thus, 1. The light and production of the large components are correct.
The small cell extensions that beat to create an up-ward current are called microvilli.
<h3>What are microvilli?</h3>
Microvilli are small extensions which are found on the surface of the alveoli of the lungs.
The microvilli play an important role in the lungs as the help to remove particles and mucus that may obstruct the lungs as a result of the upward current they create in the lungs from their beating motion.
Therefore, the paralyzed small cell extensions that beat to create an up-ward current are called microvilli.
Learn more about lung microvilli at: brainly.com/question/12993303
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Answer:
look below
Explanation:
vaccination utilises this secondary response by exposing the body to the antigens of a particular pathogen and activates the immune system without causing disease. The initial response to a vaccine is similar to that of the primary response upon first exposure to a pathogen, slow and limited
Answer: All of the finches share common ancestors
Explanation:
