Subtraction of which of the following will convert gross primary productivity into net primary productivity?

#Question id: 15521

#Unit 4. Cell Communication and Cell Signaling

#Question id: 7025

#Unit 5. Developmental Biology

Many reptile groups initiate gastrulation by migration through an amphibian- like blastopore, avian and mammalian gastrulation takes place through the:

#Question id: 23437

#General Aptitude

#Question id: 4947

#Unit 11. Evolution and Behavior

The first genes on Earth were probably

#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 ?