Complete the sentence about the continental drift theory

alfred wegener proposed the theory of continental drift after he saw that the coasts of and looked like two interlocking puzzle pieces

1. a. eastern africa
b. northern africa
c. western africa

2. a. eastern north america
b. eastern south america
c. western south america

The correct answers are:

1. C. Western Africa;

2. B. Eastern South America;

Alfred Wegener has spent lot of times looking at maps, as it was his job. One day he noticed something peculiar, the western coast of Africa and the eastern coast of South America were an almost perfect match. They looked like peaces of puzzle that belong together. In his mind this was suggesting that these two continents had been merged in the past, and than broke apart. He later got proof about his theory by observing the sea mounts in the Atlantic Ocean.

they deliver oxygen to the blood

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.