Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?

1.  the relatively short time between intense meteor bombardment and appearance of the first life forms

2.  the lack of experimental evidence that organic monomers can form by abiotic synthesis

3.  Uncertainty about which gases comprised early Earthʹs atmosphere

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#Question id: 5445

#Unit 8. Inheritance Biology

A plant height in Maize is control by 3 pair of polygene .Two varieties of maize averaging 120 and 60 inches in height, respectively, are crossed. The F1 progeny is quite uniform averaging 90 inches in height. What is percent of F2 progeny that is resemble with either 120 cm or 60 cm height?

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#Question id: 10579

#Unit 10. Ecological Principles

The following graph is growing population, which of the following represent growth pattern?

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#Question id: 4151

#Unit 3. Fundamental Processes

The signal sequences that direct proteins to the nucleus are:

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#Question id: 2101

#Unit 2. Cellular Organization

The enzyme in cholesterol biosynthesis subject to feedback inhibition is

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#Question id: 4580

#Unit 11. Evolution and Behavior

In modern terminology, diversity is understood to be a result of genetic variation. Sources of variation for evolution include all of the following except