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Oxygen makes up over 20% of the Earth's atmosphere but is a minor constituent of the atmospheres of Venus and Mars. Why? Group of answer choices On Earth, most atmospheric oxygen is formed by photosynthesis, a process that requires life. Lifeless worlds can thus not create oxygen using this mechanism. The carbon and oxygen in the CO2 in the Earth's atmosphere was dissociated into carbon and O2 by incoming sunlight, and the lighter carbon was lost to space. Venus' thicker atmosphere prevented its carbon from escaping by the same mechanism, and Mars is too far from the sun for this to be a major process. Oxygen gas forms readily only where liquid water is present. H2O is broken down into hydrogen and oxygen molecules in the Earth's oceans, and the hydrogen is eventually lost to space. Venus and Mars lack oceans, and thus cannot form O2 by this mechanism. None of the above

A food chain useda regression to finda simple novel to predict sales growth in the first quarter of the new year (January through March). The model is good for 90 days, wherex is the day. The model can be worn as follows y=103.38 2.45x, where y is in thousands of dollars. What would you predict the sales to be if day30

A Production Possibilities Frontier that is represented by a straight line instead of the typical bowed-outward shape would indicate which of the following ? Option A Increasing Opportunity Costs Option B Decreasing Opportunity Costs Option C Constant Opportunity Costs Option D Presence of Absolute Advantage Option E Presence of Comparative Advantage

A taxpayer is Single, 56 years old, and has recently begun taking distributions from their ** 401 k qualified plan**. Is the following statement correct about this scenario? Is this a correct option? The taxpayer may be exempt from an early withdrawal penalty if they use the distribution for room and board education expenses. (1) This question may have more than one sub-question, which will be delivered one at a time on confirmation of your answer.

When a firm sels a product for a price that is less then the cont of producing the product, it is called Ficenning dumpta elansicity arbitrage

Which of the following is a precipitation reaction?

None of the above are precipitation reactions.

Here are two habitats on either side of Mission Valley (Photo: 10/23/1960, by Howard Rozelle). Fill in the boxes and explain how these habitats may create differences in plant productivity.

Barber and Odean report that men earn higher returns than women

Vascular cognitive impairment, and atherosclerosis are terms associated with ____.

Under one type of merit rating, the class or manual rate is adjusted upward or downward based on past loss history. This type of merit rating is called schedule rating. experience rating. judgment rating. retrospective rating.