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TLS Online TPP Program

#Question id: 2471

Small G proteins, including Rho, Rac, and Cdc42, contribute to the coordinated movement and overall polarity of a migrating cell.  Assuming that the cell is migrating in a left-to-right fashion, which of the following is correct?

#Unit 2. Cellular Organization

  1. active Cdc42 at the leading edge of the cell and active Rho at the back of the cell

  2. active Rac at the back of the cell and active Cdc42 at the front of the cell

  3. active Cdc42 at the back of the cell and active Rac at the leading edge of the cell

  4. active Rac at the leading edge of the cell and active Rho at the back of the cell

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TLS Online TPP Program

#Question id: 18222

#Unit 9. Diversity of Life Forms

Which event during the evolution of land plants probably made the synthesis of secondary compounds most beneficial? 
TLS Online TPP Program

#Question id: 18872

#Unit 9. Diversity of Life Forms

Which of the following statements is true of archegonia? 
TLS Online TPP Program

#Question id: 18873

#Unit 9. Diversity of Life Forms

Bryophytes have all of the following characteristics except 
TLS Online TPP Program

#Question id: 18874

#Unit 9. Diversity of Life Forms

Plant spores are produced directly by  
TLS Online TPP Program

#Question id: 18875

#Unit 9. Diversity of Life Forms

Assuming that they all belong to the same plant, arrange the following structures from smallest to largest. 
1. Antheridia 2. Gametes 
3. Gametophytes               4 .gametangia 
TLS Online TPP Program

#Question id: 18876

#Unit 9. Diversity of Life Forms

Each of the following is a general characteristic of bryophytes except