Variation Flashcards

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what’s on both sides.
  • 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:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • 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.

What is variation in a species?

Variation refers to the differences between individuals of the same species.

What are the three causes of variation in a species?

Genetic causes, environmental causes, and a combination of genetic and environmental causes.

How do genetic causes contribute to variation?

We inherit alleles from our parents, which control many aspects of our phenotype, such as skin colour, eye colour hair colour, and blood group.

How can environmental causes lead to variation?

Environmental factors like sunlight, water, nutrition, accidents, exercise, and living in a particular country can cause variation.

For example, optimal growth conditions for a plant can result in it being green and healthy, while poor conditions can slow its growth.

Give an example of variation caused by a combination of genetic and environmental factors.

Height is influenced by both genetics and the environment. People with alleles for tallness may not reach their full potential if they have a poor diet.

Can muscle strength be influenced by genetic and environmental factors?

Yes, muscle strength can increase with exercise (an environmental factor), but genetic factors may also play a role in an individual’s ability to build muscle.

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