6.2 Variation and evolution

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Question 2

Medium

Evolution of new species occurs by mutation and natural selection.

What is a genetic mutation?

[1]

Describe the process of natural selection.

[3]

Which scientists independently proposed the theory of evolution by natural selection at around the same time?

Tick ( $✓\checkmark$ ) one box.

Jean-Baptiste Lamarck and Gregor Mendel
Alfred Russel Wallace and Charles Darwin
Gregor Mendel and Charles Darwin
Carl Linnaeus and Charles Darwin

[1]

The non-venomous scarlet kingsnake and the highly venomous eastern coral snake both have bright red, yellow, and black banded patterns.

Figure 12 shows a scarlet kingsnake and an eastern coral snake.

A diagram comparing the harmless scarlet kingsnake and the venomous eastern coral snake. On the left is the scarlet kingsnake, showcasing a ring pattern of red, black, yellow, black, red. On the right is the eastern coral snake, showcasing a ring pattern of red, yellow, black, yellow, red. Both snakes are coiled and look extremely similar due to their bright, repeating color rings.

The coral snake has highly toxic venom to defend itself against predators. The kingsnake is harmless and does not have venom. Scarlet kingsnakes and eastern coral snakes live in the same forest habitats.

Explain how having these bright colorful bands helps the non-venomous scarlet kingsnake survive.

[3]

6.2 Variation and evolution

Question 2

6.2 Variation and evolution Questions

6.2 Variation and evolution

Question 2

6.2 Variation and evolution Questions