what are enzymes?

Why do plants need phosphates?

Why do plants need nitrates?

Why do plants need potassium?

Why do plants need magnesium?

What are some examples of greenhouse gases?

When is mitosis used?

Proteins contain atoms of which elements?

Carbohydrates contain atoms of which elements?

Where is bile produced and stored?

What are the functions of bile?

How are some plants adapted for insect pollination?

What is the word for things relating to the lungs?

What is the word for things relating to the heart?

What is the word for things relating to the liver?

What is the word for things relating to the kidneys?

What are the three main roles of the kidneys?

What is a positive phototropism?

What is a positive geotropism?

Which substance is used to test for starch?

What substance is used to test for glucose?

Which digestive enzyme converts starch into maltose?

What do lipases convert lipids into?

What is another word for the gut?

What is the name for the process that moves food through the gut? How does it work?

Why does the stomach produce hydrochloric acid?

Which organisms have cell walls?

What are alleles?

Why does the left ventricle have a thicker wall than the right ventricle?

What are the structural differences between veins and arteries?