What is the name of an electronic device that amplifies electronic signals and was used as a switching device in the first electronic computers? Yesterday's question was "How many chromosomes does a normal human gamete have?" The answer was 23.

How many chromosomes does a normal human gamete have? Yesterday's question was "Of all the essential minerals present in the human body, which one is the most abundant?" The answer was calcium. 

Of all the essential minerals present in the human body, which one is the most abundant? Yesterday's question was "Which of the following is not an amino acid: glycine; methionine; adenine?" The answer was adenine

Which of the following is not an amino acid: glycine; methionine; adenine? Yesterday's question was "One degree of latitude at the Earth’s surface is equal to how many nautical miles?" The answer was 60 nautical miles. ​

​One degree of latitude at the Earth’s surface is equal to how many nautical miles? Thursday's question was "From what constellation do the Geminids meteor shower appear to originate?" The answer was Gemini.