Which of the following is true about how siblings respond to the birth of a new sibling?

Which of the following is true about how siblings respond to the birth of a new sibling?
 
  a. They may react with increased independence.
  b. They may react with increased anger.
  c. They may have increased toilet accidents.
  d. All of these are possible.

Question 2

Only 1 in 1,000 sperm will ever arrive in the vicinity of an ovum. Which of the following factors prevent sperm cells from traveling the entire distance to the egg?
 
  a. gravity c. current of fluid from the cervix
  b. vaginal acidity d. all of these

Question 3

Which of the following represents regression on the part of a sibling when another sibling is born?
 
  a. wanting to help mommy take care of the new baby
  b. an older child having toilet accidents, even after having been potty trained
  c. a younger sibling attempting to imitate an older sibling
  d. none of these

Question 4

Which of the following numbers correctly illustrates approximately how many sperm cells are contained in a single ejaculate?
 
  a. around 1,000
  b. 150 to 400 million
  c. It depends on the size of the ejaculate.
  d. It depends on the man's progesterone levels.

Question 5

Does the birth of a sibling have an impact on existing children in the family?
 
  a. No, it usually does not.
  b. Yes, but the effects are almost always positive.
  c. No, unless there is more than one sibling already in the family.
  d. Yes, in both positive and negative ways.

Question 6

Which of the following can be said about male conception?
 
  a. Fewer males are conceived, but more survive to birth.
  b. More males are conceived and more survive to birth.
  c. More males are conceived and more are spontaneously aborted.
  d. About the same number of males and females are conceived.

Question 7

Conflict between siblings can become greater when _____.
 
  a. parents show favoritism
  b. there is a greater harmony between the parents
  c. the siblings have easy temperaments
  d. all of these

Question 8

The sperm cell:
 
  a. is significantly larger than the egg cell.
  b. contains two Y chromosomes.
  c. does not determine the gender of the developing child.
  d. is one of the smallest types of cells in the body.