Leafs do photosythesis because leafs absorb blue and red light and reflect green just an aditional fact for ya
Answer:
True :)
Explanation:
Many Archaea are specialized to live in extreme environments. Just three types are described here. <u>Archaea are now known to live just about everywhere on Earth.</u> They are particularly numerous in the ocean.
Evolutionary biologists theorize that
the first living organisms on earth are single-celled prokaryotes. The two
prokaryotic domains are archaea and bacteria. Bacteria varies from
disease-causing pathogens to valuable photo synthesizers and symbionts while archaea
are diverse, but not pathogenic and they have the characteristics to live in
extreme environments. Moreover, the presence of prokaryotes is highly
dominating for they can be found everywhere even inside our bodies but they are
difficult to count, classify or detect.
The correct answer is: transcription factors.
Gene expression is controlled (regulated) on different levels (DNA structure, transcription, RNA processing, post-translational modification. Gene expression is regulated in order to increase or decrease the production of specific gene products.
Transcription factors can enhance the interaction between RNA polymerase and a DNA sequence- promoter, encouraging the expression of the gene. Such transcription factors are called activators. Otherwise, when the gene expression is inhibited, factors are called repressors and they bind to sequence –operator.