Problem:
Question 1: Contrast the cycling of nutrients through marine and terrestrial ecosystems.
Question 2: Which of the following is true regarding eukaryotic transcription factors?
A) Most eukaryotes have only one or a few transcription factors
B) Many transcription factors have dimerization motifs
C) Eukaryotic transcriptional activation does not require protein-protein interactions
D) Transcription factors can be active only when they form homodimers
E) Homeodomains are a class of transcription factors.
Give reasoning with your answer.