Biosphere. Bio means life, and Biosphere means ALL life on earth.
Answer:
D) presence of transcription activators or repressors
Explanation:
The reason why this is not post-transcriptional regulation is that activators actually start the process of transcription by binding to specific sites. while on contrary when repressor binds it halt the process.
For example, there is a protein called CAP which in the presence of cAMP bind with promoter region and enhances the activity of RNA polymerase . While in the absence of cAMP it can not bind to promoter hence the transcription stooped.
I think the answer is liver and hepatic portal vein
Hope this helps
Answer:
Sperm is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction. : )
