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TLS Online TPP Program

#Question id: 4961

An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to

#Unit 11. Evolution and Behavior

  1. make life on land difficult for aerobic organisms.

  2. change the atmosphere from oxidizing to reducing.

  3. make it easier to maintain reduced molecules

  4. cause iron in ocean water and terrestrial rocks to rust (oxidize).

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TLS Online TPP Program

#Question id: 15520

#Unit 4. Cell Communication and Cell Signaling

Double-negative (DN) thymocytes that have successfully rearranged their TCRβ chains are valuable, and are identified and expanded via a process known as 
TLS Online TPP Program

#Question id: 20715

#Unit 12. Applied Biology

Under anaerobic conditions microbial electron transfer and respiration can proceed only if
TLS Online TPP Program

#Question id: 2993

#Unit 2. Cellular Organization

During meiosis, a defect occurs in a cell that results in the failure of spindle microtubules binding at the kinetochores. Which of the following statements describes the most likely result of such a defect?
TLS Online TPP Program

#Question id: 11631

#Unit 8. Inheritance Biology

A cross between two green corn plants yields 23 progenies that are green and 13 progenies that are yellow. What is the genotype of the green progeny?
TLS Online TPP Program

#Question id: 12401

#Unit 6. System Physiology – Plant

IAA enters the cell either passively in the undissociated form (IAAH) or by transporter in the anionic form (IAA-) , which one of the following  transporter are involved in influx of the anionic form of auxin?