Options for part A are as follows:
A) A mutation in the operator sequence
B) A mutation in the lac-Z gene
C) A mutation in the lac-Y gene
D) A super repressor mutation
Answer:
The correct answer:
Part a - A mutation in the operator sequence
Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Part C. true.
Explanation:
part a:
If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.
part b:
The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Part c:
RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.
Answer:
Metamorphic rocks are changed by the heat and pressure inside Earth.
Explanation:
Answer
Species with lower resilience have less chance to survive.
Explanation
The resilience rate means to recover after destruction. The species having a higher rate of resilience recover fast when undergoing any damage hence have higher chance to survive. The species with lower resilience rate can collapse as a result of any damage to species by any internal factor such as disease or external factors such as food or climate change.
The basic unit of life is a D. cell.
D is the correct answer because although life is also made up of the other options, in the end, they are all made up of cells. A tissue is a group of specialized cells, and an organ is made up of different tissues. An organ system is a system of organs that work together.
Hope that helped you.
