Choose two scientists discussed in this unit and explain their contribution to evolutionary theory and the impact it had on society.

How would this stage look in meiosis I?

Homologous chromosomes carry identical alleles

In the cell DNA is found as chromatin when the cell is not dividing

Normal human sperm have:

After the process of meiosis, the resulting gametes can best be described as

Chromosomes are visible only when the cells divides

Certain diseases severely damage organs so much so that they must be removed.     Answer the following in detail.     a)  Why might a patient with pancreatic cancer, which drastically interferes with the pancreatic secretions, suffer from a duodenal ulcer? (3 marks)

A tracheotomy is a procedure performed when a person is unable to breathe through the nose or mouth.   It involves creating an opening that connects the trachea directly with the outside air.  What functions are lost with this alteration to the respiratory system?

An Electrocardiogram (ECG) measures the electrical output of the heart.