The accumulation of nitrate that results from diminished nitrate reductase activity, this symptoms is caused by

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#Question id: 29554

#XL - R Botany

One important difference between the anatomy of roots and the anatomy of leaves is that__

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#Question id: 20118

#XL - P Chemistry

Compounds with high heat of formation are less stable because

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#Question id: 4941

#XL - T Zoology

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: 2066

#XL - S Microbiology

Which of the following statements describes a characteristic feature of a carrier protein in a plasma membrane?

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#Question id: 17077

#XL - R Botany

Cells lacking Thymidine kinase if introduced into HAT medium which pathways will continue for nucleotide synthesis