<span>Polyploid plants are usually stronger and better</span>
The answer is to fill different niches.
Adaptive radiation is the process of development of new forms of organisms from an ancestral species. When an environment changes or some new niches open, speciation from the ancestral species occurs. New species have morphological and physiological adaptations which allow them to exploit a whole range of divergent environment.
Answers;
Initiation of transcription;
Proteins called transcription factors are involved in the initiation stage of transcription
Explanation;
Transcription factors are proteins that help turn specific genes "on" or "off" by binding to nearby DNA.
Transcription factors that are activators boost a gene's transcription while the repressors decrease transcription.
These factors allow cells to perform logic operations and combine different sources of information to "decide" whether to express a gene
When tryptophan is not available in the environment, the trp repressor is inactive. Therefore, RNA polymerase can bind to the promoter.
The ileocecal valve guards the passageway between the ileum and the cecum
