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TLS Online TPP Program

#Question id: 12585

Agricultural lands frequently require nutritional supplementation because

#SCPH06 I Botany
  1. Nitrogen-fixing bacteria and detrivores do not cycle nutrients as effectively as they do on wild lands. 
  2. The nutrients that enter the plants are not returned to the soil on lands where they are harvested. 
  3. The prairies that comprise good agricultural land tend to be nutrient-poor.
  4. Grains raised for feed must be fortified, and thus require additional nutrients.
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TLS Online TPP Program

#Question id: 2147

#SCPH28 | Zoology

Movement of water across membranes is facilitated by proteins called:
TLS Online TPP Program

#Question id: 4156

#SCPH28 | Zoology

The reading frame of DNA is fixed by
TLS Online TPP Program

#Question id: 1119

#SCPH01 Biochemistry

Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they:
TLS Online TPP Program

#Question id: 5694

#SCPH06 I Botany

In anaphase I, the chromosomes separate in  three different ways , which of the following way for chromosome saparation leads to nonviable gamete formation
TLS Online TPP Program

#Question id: 4941

#SCPH28 | 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