Which of the following is the best explanation of what initiated this cell to express the gene for the piece of mRNA shown? It has the DNA coding for the mRNA. It has received a signal to activate expression. A phosphate has bonded to the transcription factor. A phosphorylation cascade has occurred.

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.