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TLS Online TPP Program

#Question id: 12580

When levels of CO2 are experimentally increased, C3 plants generally respond with a greater increase in productivity than C4 plants. This is because

#XL - R Botany
  1. C   plants are more efficient in their use of CO2
  2. C   plants are able to obtain the same amount of CO2 by keeping their stomata open for shorter periods of time.
  3. C4 plants don’t use CO2 as their source of carbon.
  4. C3 plants are more limited than C4 plants by CO2 availability because of transpirational water loss.
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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: 1752

#XL - Q Biochemistry

Dendritic cells can be driven from a resting state to an activated state by the T-cell surface molecule:
TLS Online TPP Program

#Question id: 46

#XL - Q Biochemistry

The three-dimensional structure of a protein is determined primarily by:
TLS Online TPP Program

#Question id: 15338

#XL - S Microbiology

Which cell generated on the receipt of SCF/c-Kit signaling lose the capacity for extensive self-renewal, but retain the potential to differentiate into several different hematopoietic lineages and also transiently express the molecule CD34?
TLS Online TPP Program

#Question id: 20241

#XL - P Chemistry

The correct order of dipole moment is