Answer:
Option A. inducer.
Explanation:
The lac operon is an inducible operon. The presence of lactose allows the gene expression for the metabolism of lactose. The IPTG mimics the structure of allolactose. The allolactose is the direct inducer of the gene of lac operon. Lactose by converting to allolactose act as a inducer. The repressor in the lac operon binds with the operator region and thus inhibits the process of transcription.
The allolactose binds with repressor and thus inhibits its binding to operator thereby initiating the process of transcription. As the IPTG mimics allolactose so it binds with repressor and act as a inducer. Thus, option A is correct.
A. greenhouse gases interact with infrared photons and reflect them back to earth's surface
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When a comet is close to the sun, the force from the sun's radiation pushing against the comet making a dust and/or gas tail. The comet being close to the sun also forms the coma of a comet due to it's radiation. The only thing that doesn't exist while being close to the sun is the nucleus. In conclusion, When a long period comet is farthest from the sun in its orbit, C. the Nucleus exist.
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Answer:
The function of the digestive system is digestion and absorption.
Explanation:
Digestion is the breakdown of food into small molecules, which are then absorbed into the body.
Answer: The skeletal portion of the system serves as the main storage is to help regulate mineral balance in the bloodstream.
I hope this help. Stay safe, wash your hands
