Ithink my teacher made a mistake on this question or am i wrong?

which is the largest group of organisms?

1. birds
2. eukaryotes
3. prokaryotes
i chose 2. eukaryotes

keep in mind he said which is the largest group of organisms, a eukaryote is any organism that has eukaryotic cells (which have nucleus unlike the prokaryotic cells). birds are eukaryotes so i don't really understand why i got it wrong. either way would be correct because birds are

The human body maintains a temperature of around 98.6 degrees at all times. enzymes are involved in almost every chemical reaction in the body. which of the following describes the connection between these two statements? a. enzymes function best at a specific temperature. b. the body needs to be warm to prevent hypothermia. c. the body is kept relatively warm to prevent too much enzyme action. d. there is no connection between the two statements.