True because communities are just groups of organisms that live together, without them there would be no food chain and no way to have particular adaptations to environments because no animal would live in one place long enough
Answer: True
Randomization is a process in which a subject or experimental unit is chosen at random without giving priority to desired characteristics required in an experimentation process. This results in non manipulated and unbiased data obtained after experimentation process.
Mucous membrane, membrane lining body cavities and canals that lead to the outside, chiefly the respiratory, digestive, and urogenital tracts. Mucous membranes line many tracts and structures of the body, including the mouth, nose, eyelids, trachea (windpipe) and lungs, stomach and intestines, and the ureters, urethra, and urinary bladder.
Correct answer is option D.
Transcription activators accelerate transcription, while transcription factors assist RNA polymerase binding.
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Transcription factors are the proteins which help in proper binding of RNA polymerases in the promoter region of DNA so as to facilitate transcription.
Activators on the other hand, help in the enhancement of the transcription rate.
Transcriptional activators are basically proteins which bind to the regulatory elements known as enhancers so as to increase the rate of transcription. Enhancers are specific DNA sequences, which may be present in the upstream or downstream region of the gene which is going to be transcribed.
It may be noted here that transcription factors are only present in eukaryotes. In prokaryotes, sigma factors are present instead of transcription factors to facilitate proper binding of RNA polymerases on the DNA.
