Question

1. what best describes how the author supports the point in paragraph 2 that dogs have an edge that humans and some animals dont have?

a. the author notes that dogs can smell cancer.
b. the author notes that humans have 5 million cells in their noses.
c. the author notes that humans cannot smell as well as dogs can smell.
d. the author notes that dogs have 300 million cells in their noses and jacobsons organ.

1. why might dogs not replace machines in detecting cancer?

a. most dogs cannot be trained to sniff out cancer.
b. training dogs would take a lot of time and money.
c. some dogs might not like sniffing cancer samples.
d. every dog is the same.

1. how does the author support the point in paragraph 5 that discovering that dogs can smell cancer is important?

a. the author explains that dogs could be used to find tissue samples.
b. the author explains that dogs wont be regularly used to smell cancer.
c. the author explains that scientists could create a robotic nose based on a dogs nose.
d. the author explains that scientists could be told whenever they find cancer in a tissue sample.

1. look at the picture. what else does it help you understand about the last paragraph?

a. it shows that dogs get along well with people.
b. it shows that dogs can sniff out cancer.
c. it shows that dogs can sniff other things.
d. it shows that dogs help people with severe disabilities.

Explanation:

1. The author supports the point about dogs' edge by highlighting their high - number of nose cells and Jacobson's organ. Option D is correct as it directly relates to the unique biological features of dogs that give them an olfactory advantage.
2. Training dogs to detect cancer would be time - consuming and costly, which is a likely reason they may not replace machines. Option B is correct.
3. The author supports the importance of dogs' cancer - smelling ability by suggesting scientists could create a robotic nose based on a dog's nose. Option C is correct.
4. Without seeing the picture, assuming it is related to the text about dogs' cancer - sniffing ability, it likely shows that dogs can sniff out cancer. Option B is correct.

Answer:

1. D. The author notes that dogs have 300 million cells in their noses and Jacobson's organ.
2. B. Training dogs would take a lot of time and money.
3. C. The author explains that scientists could create a robotic nose based on a dog's nose.
4. B. It shows that dogs can sniff out cancer.