#Question id: 12545
#Unit 10. Ecological Principles
#Question id: 4684
#Unit 3. Fundamental Processes
The depicted region contains two genes (cI and cro) and three promoters (PR, PL, and PRM), these promoters are direct the transcription such as;
a) PR and PL are is a weak promoter and only directs efficient transcription when an activator is bound just upstream
b) PR and PL are strong, constitutive promoters, they bind RNA polymerase efficiently and direct transcription without help from an activator
c) PRM, is a weak promoter and only directs efficient transcription when an activator is bound just upstream
d) PRM are strong, constitutive promoters, they bind RNA polymerase efficiently and direct transcription without help from an activator
Which of the following from the above combination is correct ?
#Question id: 5017
#Unit 11. Evolution and Behavior
Arrange these events from earliest to most recent.
1. emission of lava in what is now Siberia at time of Permian extinctions
2. emission of lava that solidified at the same time as iron-bearing terrestrial rocks began to rust
3. emission of lava that solidified at the same time as rusted iron precipitated from seawater
4. emission of lava in what is now India at time of Cretaceous extinctions
#Question id: 5561
#Unit 5. Developmental Biology
In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are ________.
#Question id: 19083
#Unit 6. System Physiology – Plant