The lac operon, which stands for Lactose operon is known as an inducible system. It is the an operon required for the transport and metabolism of lactose some enteric bacteria (Echerichia coli for example). The Lac operon is only activated in the presence of a key molecule. The key molecule is lactose.
From the given options the following best describes the Lac operon:
D. The repressor is freed from the operator when lactose is present.
 
        
             
        
        
        
Answer:
Your answer is D). Like most cold-blooded animals, geckos' bodies are unable to maintain a homeostatic body temperature on their own, therefore they must bask in the sun in order to increase their body heat, and hide in the shade when it's too hot.
 
        
                    
             
        
        
        
Answer:
I'm glad you asked!
Explanation:
The answer is light excites electrons that create a current.The Photo voltaic cell puts the light into a type of electricity and BOOM ,there you have it!
 
        
             
        
        
        
Answer: The answer for the first one is 
1: Eukaryotic 
2: mitochondria
3: carbon dioxide, water, atp
4: glucose, oxygen
5: Glucose.
 
 
        
             
        
        
        
Answer:
Soil living organisms compromise from mammals (such as rats) to micro organisms (such as nematodes and protozoa). Soil organisms help in the modification of soil, and also in the decomposition of organic matter. However they can also pose as a treat to to some crops, as they are responsible for some plant diseases.
Explanation:
When living organisms breathe they give out carbon dioxide gas as a waste product. Carbon dioxide gas can be detected (identified) using a carbon dioxide indicator solution called bromothymol blue. To find out if there are living organisms present in the four different levels of soil takenfrom the deciduous forest.