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: 11534

#SCPH06 I Botany

Which of the following is the precursor of auxin?

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#Question id: 1298

#SCPH28 | Zoology

As fibroblasts form a three-dimensional structure in contact with the ECM, the cells bound to ECM:

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#Question id: 1304

#SCPH28 | Zoology

Which of the following structures form cytoplasmic channels that connect adjacent plant cells through the cell walls?

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#Question id: 5437

#SCPH06 I Botany

A pure line dominant plant has height of 100 cm while pure line of recessive plant has 20 cm. If one dominant gene contribution is 8 cm, what is number of QTL control plant height?

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#Question id: 19458

#SCPH01 Biochemistry

How phase contrast and DIC microscopy are used to image live cells and unstained tissues?