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: 5161

#General Aptitude

Find the unit digit of 83 × 87 × 93 × 59 × 61. 

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#Question id: 12298

#Section 1: Ecology

The number of offspring an individual produces over its lifetime is _______________.

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#Question id: 10578

#Section 2: Evolution

The population of annual breeder growing at a rate of 10% per year. Initial population size is 1200. After 3 years population size would be

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#Question id: 12323

#Section 1: Ecology

Which of the following is considered by ecologists a measure of the ability of a community either to resist change or to recover to its original state after change?

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#Question id: 3443

#Section 2: Evolution

The evolution of mating systems is most likely affected by