The early earth atmosphere was _____. MULTIPLE CHOICE. Choose only one.  a. Reducing and favors biosynthetic reactions b. Reducing, due to absence of carbon dioxide c. Oxidizing, due to abundance of oxygen d. Oxidizing an favors breakdown of molecules

Q: Which of the following is True about ocean ecosystems?a. Surface waters typically have abundant…

A: An ecosystem is an area where organisms, such as plants, animals,etc along with their weather work…

Q: Which of the following processes of the carbon cycle involves the incorporation of the carbon in…

A: Carbon cycle It is the biogeochemical cycle through which carbon is exchanged between land,…

Q: The evolution of photosynthesis resulted in a. an increase in the amount of O2 in the atmosphere. b.…

A: Mesophyll cells are the most active sites of photosynthesis. The process in which light energy is…

Q: Understanding that carbon cycles, what action could we do in order to remove carbon from the…

A:

Q: The energy that is used by almost all living things on our planet comes from the sun. It is captured…

A: Cellular respiration is a catabolic pathway a set of metabolic pathways that don’t create the…

Q: Chemiosmosis is a process that drives the creation of ATP. This process requires the use of specific…

A: There were many studies that focused on understanding the composition of the early atmosphere of…

Q: The first organisms that oxygenated the atmosphere were a. cyanobacteria b. phototrophic organisms…

A: Prokaryotes are cosmopolitan organisms and cover every imaginable surface where there is sufficient…

Q: According to the Purple Earth hypothesis, in what order did photosynthesis first occur in the three…

A: Introduction  Photosynthesis is the biological process by which plants, algae, and some bacteria…

Q: Photosynthesis provides the ________ needed by nearly all living things.   a. ATP   b. energized…

A: Photosynthesis is the process of conversion of carbon dioxide and water into the simple sugar…

Q: Almost all of the oxygen gas in today’s atmosphere ispresent as a result ofa. outgassing from…

A: The Atmosphere of planet Earth is majorly comprised of nitrogen and oxygen, which account for 99% of…

Q: Which type of organism does NOT photosynthesize?   a. Heterotrophs   b. Producers…

A: The process of conversion of light energy into chemical energy carried out by plants and other…

Q: Which of the following statements is a correct distinction between autotrophs and heterotrophs? a.…

A: Autotrophs are the organisms having autotrophic mode of nutrition which means these organisms can…

Q: In 1941, biologists exposed photosynthesizing cells to water containing a heavy oxygen isotope,…

A: Introduction Photosynthesis is a process used by plants, algae, and cyanobacteria to transform…

Q: Scientist have determined that the early Earth had no free oxygen anywhere. Briefly explain what…

A: Scientists suggest that the early atmosphere of the earth was very hot and had no ozone or free…

Q: While on a walk in the woods, a student observed a tree that had died and fallen onto the ground.…

A: The material remains of dead plants and animals are acted upon by micro-organisms which are called…

Q: Some key words are given below, looking into these words, write a convincing scientific explanation…

A: i. Photosynthetic pigments :- Photosynthetic pigments are molecule that absorbs light and has a…

Q: The burning of fossil fuels releases CO2 into the atmosphereand is detrimental to the Earth’s…

A: Carbon is one of the important elements of living things as well as nature. It forms 49% of the dry…

Q: If space exploration revealed a planet that had the water, sunlight, and climate, necessary to…

A: There has been consistent search of water on the nearby planets, especially on Mars. Mars is closely…

Q: A. What is the PROTEROZOIC LIFE? B. Discuss the Great Oxygenation Event. C. Discuss the CAMBRIAN…

A: Geological time scale is a evolutionary event  which determines how the life appear , its…

Q: The green sulfur bacteria, using sunlight as an energy source for photosystem I, are unable to split…

A: Photosystem I (PSI) is a protein complex found in the thylakoid membrane of chloroplasts in…

Q: Stanley Miller’s classic experiment suggests that ______ ______ of organic compounds may have been…

A: Scientists estimate that the universe is around thirteen thousand eight hundred and twenty billion…

Q: Scientists think that terrestrial life probably originated in Earth's oceans because Choose one:…

A: Question - Scientists think that terrestrial life probably originated in Earth's oceans because…

Q: Which of the following statement is true about fossil fuels? A. Lignite is the highest-grade coal

A: Fossil fuels are the the substances that provide energy after combustion.

Q: Fossils and fossil fuel Which action would decrease the amount of atmospheric carbon dioxide? A…

A: air pollution, is the release into the atmosphere of various gases, finely divided solids, or finely…

Q: Stanley Miller showed experimentally that inorganic gases could form simple organic molecules…

A: The Miller-Urey experiment provides an evidence for the hypothesis supporting chemical origin for…

Q: Use the diagram to answer questions 10. What is the gas releases in the experimentation shown? Bulb…

A: As per our company's guidelines we are supposed to answer a single question at a time only, please…

Q: Which of the following organism classification is based on free energy sources? A. lithotrophs B.…

A: Introduction All living organisms require energy for their metabolic process. Some organisms (green…

Q: Which of the following was likely MOST important for life to begin existing on Earth?   A. sunlight…

A: The correct answer is-  C. Sunlight

Q: Photosynthetic organisms convert the energy of __________ intochemical energy.a. electrons b.…

A: Photosynthesis, a process by which the plants are involved in the transformation of light energy…

Q: Which of the following represent issues of great uncertainty regarding early Earth? Choose one or…

A: All of the above choices (A, B, C, D, and E) represent issues of great uncertainty regarding early…

Q: You are growing algae in culture and expose them to CO2 that contains radiolabeled oxygen. Where…

A: After exposing algae to CO2 containing radiolabeled oxygen during photosynthesis, the radiolabeled…

Q: The Miller experiment consisted of various gases, believed to have been present in the early…

A: Millers experiment proved that If electric discharge is passed through a mixture of such gases have…

Q: What is one way humans put carbon into the air? Group of answer choices a. Surfing the internet b.…

A: Carbon is one of the important elements of living things as well as nature. It forms 49% of the dry…

Abiogenesis