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TLS Online TPP Program

#Question id: 11092

Which statement is the most accurate definition of external respiration?

#XL - T Zoology
  1. Bulk flow (convection) of air or water to and from the gas-exchange membrane.
  2. The process by which O2 is transported to the gas-exchange membrane from the environmental medium and by which CO2 is transported away from the membrane into the environmental medium.

  3. The process by which CO2 is transported to the gas-exchange membrane from the environmental medium and O2 is transported away from the membrane into the environmental medium.

  4. Diffusion of O2 and CO2 across the gas exchange membrane.
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TLS Online TPP Program

#Question id: 18078

#XL - T Zoology

Which of the following can be found in gymnosperms? 
TLS Online TPP Program

#Question id: 18078

#XL - R Botany

Which of the following can be found in gymnosperms? 
TLS Online TPP Program

#Question id: 18079

#XL - S Microbiology

Within a gymnosperm megasporangium, what is the correct sequence in which the following should appear during development, assuming that fertilization occurs? 
1. Sporophyte embryo 2. female gametophyte 
3. egg cell                 4. megaspore 
TLS Online TPP Program

#Question id: 18080

#XL - S Microbiology

The following are all adaptations to life on land except
TLS Online TPP Program

#Question id: 18080

#XL - T Zoology

The following are all adaptations to life on land except
TLS Online TPP Program

#Question id: 18222

#XL - S Microbiology

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