When testing a leaf for the presence of starch, the correct sequence of procedures is:

One Faraday represents:

Herbicides are used to destroy:

The introduction of machines in agriculture results in the unemployment or farm workers.

The type of unemployment these workers suffer is

If the relative atomic mass (RAM) = 1 for hydrogen and 16 for oxygen, the formula mass for H₂O₂ is:

Active transport:

Which of the following is based on exploiting non-renewable natural resources?

When potassium burns in chlorine, the material that is oxidised is called:

Which one of the following chemicals is used to test for starch?

Which of the following are examples of environmental variation in humans?
Ⅰ hair colour
Ⅱ height
Ⅲ intelligence
Ⅳ body mass

In the diagram, B is due north of A; C is east of B, and AB = BC.

75 g of freshly dug soil was placed in an oven at 105 ℃ for 24 hours. It was allowed to cool, then reweighed. If the final mass of the dry soil was 66 g, what was the % water content of the original soil sample?

Which of the following is NOT a prime number?

In making bread the enzymes in yeast break down starch to give:

The wall of the heart is made of:

When an element combines with oxygen we get an:

The animals shown in the diagram were identified using a dichotomous key based on the visible characteristics listed below:
Ⅰ body shape
Ⅱ number of legs
Ⅲ number of wings
Ⅳ number of eyes
Ⅴ number of antennae
Which characteristics could be used to divide the animals into two groups?

A current of 2 mA is flowing through a wire. How long will it take for 6 coulombs of charge to pass?

What is the BEST option available to persons who are qualified but cannot find a job?

In a food chain a plant is a producer because it produces: