Biology revision

A Level Biology: Microorganisms and Health 1 – Microorganisms Hi! Welcome to my first video on the series about Microorganisms and Health. The first thing we’re going to look at are the types of...

A Level Biology: Microorganisms and Health 5 – Acquire Immunity and Vaccinations Hi! Welcome to my fifth video about Microorganisms and Health. Today, we are going to be looking at the different...

A Level Biology: Microorganisms and Health 2 – Physical Barrier and Phagocytes Hi! Welcome to my second video on the series about Microorganisms and Health. What we are looking at today are the...

Experiment OB3A, To test a variety of foods for the pressence of startch. The Experiment involves the use of chemicals. So wear safety goggles and gloves during the experiment. Today the chemical we...

A Level Biology: Microorganisms and Health 3 – Lymphocytes Hi! Welcome to my third video on the series about Microorganisms and Health. Today, we are going to be looking at further immune responses....

You have likely produced ammonia in the laboratory from the thermal decomposition of ammonium chloride, or from the reaction of ammonium and hydroxide ions. Have you ever wondered how ammonia is...

In this lesson you will learn: What Avogadro's Number is and What Molar Volume is Amedeo Avogadro was an Italian Scientist. He gave his name to the number of particles in a mole (see our video...

Hard and Soft Water. If you wash with soap using rain water washing is easy and there are plenty of Bubbles -- we say the water is soft. If you use well or tap water it is sometimes difficult to get a...

Pituitary Pituitary adrenal system is for chronic stress, higher brain centres goes straight to the Hypothalamas pituitary gland, ACTH, the adrenal cortex realases corticosteroids like cortisol to...

A Level Biology: Populations 5 – Exam Questions Hi! Welcome to my fifth video on the series about Population. Today, we are going to be looking at some more exam questions. The questions we are going...