PGT Biology Teacher Interview Questions and Answers

There are approximately 35 phyla in the animal kingdom, while the number of phyla in the plant kingdom is debated.

• The number of phyla varies depending on the classification system used.

• In the animal kingdom, examples of phyla include Chordata, Arthropoda, and Mollusca.

• In the plant kingdom, examples of phyla include Bryophyta, Pteridophyta, and Coniferophyta.

The heart is run by electrical impulses generated by the sinoatrial node (SA node) located in the right atrium.

• The SA node acts as the natural pacemaker of the heart.

• The electrical impulses generated by the SA node travel through the atria and cause them to contract.

• The impulses then reach the atrioventricular node (AV node) which delays the impulse for a short time before sending it to the ventricles.

• The impulse then travels through the bundle of His and Purkinje fibers, cau...read more