Answer:
Double Helix
The structure of DNA is called a double helix.
Answer:
Cells, From birds to bacteria, we all have cells or are cells, depends.
When climbing a mountain, we can observe transitions in biological communities that are analogous to the changes in biomes at different latitudes.
Operons are the functional units of transcription and genetic regulation. These are found in bacteria and their viruses where genes coding for functionally related proteins are grouped along the DNA.
The two types of operons are- inducible and repressible.
They regulate the genes as in negative inducible operons, a regulatory repressor protein is bound to the operator. It prevents the transcription of the genes on the operon. If positive inducer is present, it binds to the repressor and changes its conformation so it is unable to bind to the operator.
A
This should be considered a case of natural selection because humans were not selecting for particular desirable traits.
Explanation:
The individuals in the population who held even the slightest advantage in the tolerance of the oil spill had higher chances of surviving and passing their genes to the next generation. Fishes with low tolerance perished even before getting to maturity. Therefore with each generation, traits for oil tolerance in the population increased by natural selection enabling the population to evolve towards increased intolerance to oil over a period of several generations.
Learn More:
For more on natural selection check out;
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