Phytoplankton are producers
The correct answer is C. biological theory.
Biology deals with the inner workings of our body - so, if something is the result of hormones and other physiological processes, then it will definitely be related to biology. The other options have more to do with the environment, rather than with the body itself.
May have once had liquid water, has a reddish color from iron, is a terrestrial planet,
Answer:
B -the absence of the inducer, but not in its presence
Explanation:
In positive repressible regulalor mechanisms transcription of the structural gene(s) occurs in the absence of the inducer because proteins are normally bound to the pertinent DNA segment. when an inhibitor is bound by the inducer, it is prevented from binding the DNA. which will the stops the activation and transcription of the structural genes.
Example of positive repressible regulator is Activator .
Regulating the rate of transcription is a mechanism of gene regulation leading to the productionn of more than one protein product from a single gene.
If you have one sickle cell gene, you have sickle cell trait and you will not develop the sickle cell disease. If you inherit two sickle cell genes, you have sickle cell anemia.
