Question

question 21
fertilization, which involves penetration of the ovum by a single sperm, occurs in the ______ (fallopian tube).
uterine horns
last part of the oviduct
cervix
uterine body
question 22
what is the earliest time at which pregnancy in a bred dog can typically be diagnosed?
1 week
3 weeks
5 weeks
7 weeks

Explanation:

For Question 21, fertilization in humans and many mammals occurs in the fallopian tube (oviduct). The uterine horns, cervix, and uterine body are not the sites of fertilization.
For Question 22, pregnancy in a bred dog can typically be diagnosed earliest around 3 weeks. One - week is too early for reliable diagnosis, and 5 - week and 7 - week are later than the earliest possible time for diagnosis.

Answer:

Question 21: fallopian tube
Question 22: 3 weeks