Answer:
Messenger RNA (mRNA), molecule in cells that carries codes from the DNA in the nucleus to the sites of protein synthesis in the cytoplasm (the ribosomes).
Cyclin-depedant kinases (Cdks).
The sightings start appearing earlier and earlier each year. my hypothesis is that this, unfortunately, is somehow the work of humans, destroying the bird's habitats or scaring them off somehow...
It is a control, which is used for the comparison between it and the other experimental groups in an experiment.