Solutions to Global Food Demand Flashcards

1️⃣ Familiarise yourself with the flashcards:

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  • Make sure you understand the information on each card. If something's unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

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  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What does food security mean?

Having enough safe, nutritious, and affordable food for everyone, at all times.

What does yield mean in farming?

The amount of useful food produced per plant or per field.

Name three ways biology can help meet global food demand.

Selective breeding, tissue culture, and genetic engineering (GM crops).

How does selective breeding of crop plants increase yield?

Farmers choose plants with the biggest harvest and breed them. Over many generations this gives high-yield crops.

How does selective breeding of farm animals help food supply?

Breed animals that grow fast or make more milk or eggs. Their young then produce more food.

What is tissue culture?

A way to grow many new plants from small pieces of a parent plant on a sterile, nutrient gel.

How does tissue culture help increase food production?

It makes many identical, disease-free plants quickly, so farmers can plant more at once.

What is a genetically modified (GM) crop?

A crop with DNA changed by adding a useful gene from another organism.

Give two traits that GM crops can have to raise yields.

Pest resistance and drought tolerance.

What is Golden Rice and why is it useful?

A GM rice that makes beta-carotene, which the body turns into vitamin A, helping prevent deficiency.

How does herbicide resistance in crops help farmers grow more food?

It lets farmers kill weeds without harming the crop, so plants get more light, water, and minerals.

Why is disease resistance in crops important for food security?

It stops many plants from being killed by pathogens, so yields stay high.