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Question 1

Suggest how the faster rate of growth of a crop may increase profit for a farmer.

Answer 1

The crop is ready quicker/ harvested earlier/ less time required/ allows land to be used again

Question 2

In an experiment to find the most effective concentration of antibiotic to kill a human disease, suggest why the flasks were incubated at 35 degrees

Answer 2

Fastest rate of growth / enzymes don’t denature / optimum temperature for enzymes / at or close to body temperature

Question 3

In an experiment to find the most effective concentration of antibiotic to kill a human disease, explain why the same volume of bacterium culture was out into each flask.

Answer 3

So there was the same amount of bacteria, therefore only one variable in the investigation

Question 4

In an experiment to find the most effective concentration of antibiotic to kill a human disease, what is the purpose of a control flask.

Answer 4

To show that only the antibiotic has an effect in the bacteria

Question 5

In an investigation to to find a possible link between tooth extraction and people with infected heart valves. Suggest why the people chosen where all of a similar age.

Answer 5

Age affects: Immune system
Heart
Teeth