Aposematic, or warning coloration, serves to protect an animal or plant by signaling to potential ________ to stay away.
A. competitors
B. predators
C. mates
D. rivals
B. predators
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Many species of gulls feed their chicks by regurgitating food. When parents return from foraging, the gull chicks peck at a red spot on the parent's bill, which causes the parents to open the bill and regurgitate their food
Chicks will peck at a red dot painted on any long, slender object. For the chicks, pecking is a ____ and the red dot is a ____ . For the adult gulls, the chicks pecking at their bills is a ____ and regurgitating food is a ____ . Fill in the blank with the appropriate word.
Transcription of the XIST gene results in ________
a. an active X chromosome b. carpel formation in Arabidopsis thaliana c. stamen formation in Arabidopsis thaliana d. a Barr body
The ability of DNA polymerase to repair its own nucleotide mismatches is called ____________________. Fill in the blank(s) with the appropriate word(s)
I am a ribonucleoprotein; I contain both a polypeptide and an RNA molecule. My RNA binds to unique sequences on a DNA molecule, targeting them for cleavage by my polypeptide. I occur naturally in microbes to protect against viral attack, and I can be engineered in the lab for precision DNA editing. What am I?
A. Cas9 nuclease B. EcoR1 restriction enzyme C. 3' oligonucleotide D. RNA polymerase