- Thermosphere - Fourth layer of Earth's atmosphere.
- Aurora Borealis - Ionosphere layer of thermosphere.
- Large-scale air turbulence and mixing at this layer - Troposphere
- Stratosphere - Second lowest layer of Earth's atmosphere. No Air turbulence so airplanes fly in this layer.
- The coldest temperatures in the atmosphere occur at the junction- of Stratosphere and mesosphere
- Maximum ozone - Ozone layer in Stratosphere
Explanation:
Atmosphere is formed by mixing of gases. The layers of atmosphere is given below.
1. Troposphere - 
- The first layer of the atmosphere.
- Weather occurs in this layer.
2.Stratosphere - 
- The second layer of Earth's atmosphere. 
- Contains Ozone layer.
3. Mesosphere - 
- The third layer above the stratosphere. 
- Coldest layer.
4. Thermosphere - 
- The fourth layer of the atmosphere. 
- Warmest layer.
- Ionosphere - lowest level of thermosphere above mesosphere. 
- Aurora Borealis, Northern and Southern lights are seen in this layer.
- Exosphere - outermost layer of thermosphere.
- Satellites are in this layer.
- Outer space with no gravity.
 
        
             
        
        
        
In reproductive cells so the answer is A and B
        
                    
             
        
        
        
Well one it is true cuz it is true but ya your right ok
        
             
        
        
        
Answer:
I think the answer is the first option (A)
Explanation:
 
        
             
        
        
        
Answer:
A,B and E 
Explanation:
- I+: I refers to the lac repressor, the + indicates that the repressor is functional
- P+:  P refers to the promoter region and the + indicates that the promoter is functional
- Oc:  O refers to the operator region, but the Oc indicates that the operator is constitutive ie. that it is always on/ can't be turned off.
- Z-: Z refers to the LacZ gene which produces β-galactosidase. Z- indicates that this gene is non-functional 
- Y+:  Y refers to the LacY gene which produces the permease protein. Y+ indicates that this gene is functional
So based on the breakdown above:
- C is not true because the lac operon is an inducible system. The operator needs to be able to be repressed. In this case the operator is constitutive (always on)  which is not the correct form.
- D is not true because Z-, no β-galactosidase is produced.
Only A, B and E apply.