Q: Answer the question

Stout beardfish live in the deep ocean. They live so far down that there is no light. Which characteristic would best help stout beardfish to survive in the dark?

A: two whiskers that locate food

Q: Answer the question

Which mechanism is not an example of a negative feedback mechanism in the human body?

A: contracting muscles

Q: Answer the question

Which of the following Earth layers has the greatest density?

A:
inner core