Transcript Bell Ringer #3

Bell Ringer #3
Jan 30/31
Question 1
 Dogs (Canis familiaris) are most
closely related genetically to which of
the following organisms?
 A African hunting dog (Lycaon pictus)
 B Gray wolf (Canis lupus)
 C Grizzly bear (Ursus arctos)
 D Domestic cat (Felis catus
Question 2
 The medulla, part of the brain stem,
reacts quickly to increased levels of
CO2 in the blood and stimulates a
response from the —
 A excretory system
 B immune system
 C respiratory system
 D integumentary system
Question #3
Lactose is a naturally occurring sugar found in
milk. Some dairy products, such as yogurt,
may contain live bacteria. These products are
useful to people who lack the ability to digest
lactose. What does this information
demonstrate?
A Bacteria raise the acidity of processed foods.
B Some bacteria interfere with digestion.
C Bacteria can prevent insulin production.
D Some bacteria are beneficial to human health.