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.
Answer:
Microbes are vital to control biogeochemical cycling of the elements essential for life.
Explanation:
Microbes are vital to control biogeochemical cycling of the elements essential for life. In a biogeochemical cycle, nutrients move through the ecosystem, allowing many forms of matter being passed from one organism in one part of the biosphere, to another organism in another part of the biosphere (microorganisms can circulate through biotic or abiotic ecosystems), in this way, ensuring the supply of essential nutrients for plant crop and growth, the degradation of organic matter, the maintenance of soil quality/structure and the carbon losses to the atmosphere. In conclusion, without microbiological activity, nutrients cycling and other functions in the ecosystem would be impossible.
They are condensing in the prophase stage
Answer:
evidencia de un antepasado común entre grupos de vertebrados (gnatóstomos)
Explanation:
En el estudio comparativo arriba descripto, se encontraron semejanzas que provienen de un antepasados común. Este tipo de evidencia se conoce como homología, es decir, semejanza entre diferentes grupos de organismos causada por un mismo origen evolutivo. Los gnatóstomos (vertebrados con mandíbula) conforman un grupo de organismos el cual incluye peces óseos, peces cartilaginosos, anfibios, reptiles, aves y mamíferos. En este caso, las extremidades del grupo de los gnatóstomos (las cuales tienen como origen común la aleta de un pez primitivo) son similares porque son estructuras homólogas.
