TLS Online TPP Program

#Question id: 13214


The stomata will open less or even remain closed on a sunny morning when

#Unit 6. System Physiology – Plant
  1. soil water is abundant, plant dehydration takes place
  2. soil water is less abundant, the solar radiation incident on the leaf favors high photosynthetic activity, the demand for CO2 inside the leaf is large
  3. soil water is less abundant, plants avoid dehydration
  4. soil water is abundant,  stomatal pores allows the diffusional resistance for water loss from leaves
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TLS Online TPP Program

#Question id: 10471

#Unit 6. System Physiology – Plant

Under temperate conditions, which one of the two major factors that are involved with light-dependent stomatal opening are,

TLS Online TPP Program

#Question id: 10470

#Unit 6. System Physiology – Plant

when the environmental stimuli associated with high CO2 demand inside the leaf are transduced into

TLS Online TPP Program

#Question id: 10469

#Unit 6. System Physiology – Plant

When aquatic plants are kept in terrestrial habitat; what adaptations do these plants develop themselves?

TLS Online TPP Program

#Question id: 10468

#Unit 6. System Physiology – Plant

Why are stomata required in leaf surface?

TLS Online TPP Program

#Question id: 10467

#Unit 6. System Physiology – Plant

The COP1-SPA complex acts as a positive regulator as well as acts as negative regulator  by shown in statements;

a) Act as negative regulator−that targets transcription factors for degradation during phytochrome and cryptochrome responses

b) Acts as a positive regulator−that targets transcription factors for degradation during phytochrome and cryptochrome responses

c) Acts as a negative regulator− during UV-B signaling by interacting with the C-terminal region of UVR8 in the nucleus UVR8- COP1-SPA complex then activates the major transcription factor HY5, which controls the expression of many of the genes induced by UV-B

d) Acts as a positive regulator during UV-B signaling by interacting with the C-terminal region of UVR8 in the nucleus UVR8- COP1-SPA complex then activates the major transcription factor HY5, which controls the expression of many of the genes induced by UV-B

Whichof the following combination from avbove statements of UVR8 is true?

TLS Online TPP Program

#Question id: 10466

#Unit 6. System Physiology – Plant

In Arabidopsis, phot1 mutants have a normal avoidance response and a poor accumulation response, phot2 mutants lack the avoidance response but retain a fairly normal accumulation response, while phot1/phot2 double mutant lack both the avoidance and accumulation responses. These results indicate that,