Answer:
minutes
Explanation:
For a First order reaction, the rate constant is determined by
Where
k= rate constant
t= time required for a reaction
a= initial concentration
x= amount of reactant decomposed in time t
a-x= amount of reactant left after time t
Let the initial concentration be 
Then
Substituting the given values in above equation, we get -
Also,
minutes
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Answer:
Explanation:
Biosphere is the portions/regions of the earth (including land, sea and atmosphere) where living organisms exist. From the picture attached, it can be seen that there are living organisms in the hydrosphere (fishes), geosphere (plants) and anthrosphere (human). The entire system should have been labelled biosphere and not atmosphere.
NOTE: Atmosphere is an empty air space surrounding/around the earth (or other celestial body).
Answer:
A promoter refers to a DNA sequence, that is, situated upstream of a gene and signals the start of transcription.
A repressor refers to a transcription factor that prevents transcription by combining with the operator site.
An insulator refers to an element that obstructs the signals between the promoters and enhancer.
A regulatory gene refers to a gene, which monitors the expression of one or more genes by preventing or encouraging transcription.
An inducer refers to a molecule that stimulates the synthesis of mRNA by disabling the protein, which inhibits the transcription.
An operator refers to a short sequence of DNA situated close to the promoter region, and is recognized by a repressor protein.
Asexual: creates genetically identical offspring, organism doesn't have to waste time finding a mate, requires the contribution of a single parent
Sexual: creates genetically unique offspring, organism needs time to reach adulthood to reproduce, requires the contribution of two parents
