Evolution

Question 1

What is the theory of Evolution?

Answer 1

More than 3 billion years ago, life on Earth began a simple organisms from which all the more complex organisms evolved (rather than just popping into existence).

Question 2

Describe points of evolutionary relationships

Answer 2

1) Species with similar characteristics often have similar genes because they share a recent common ancestor and are closely related. Often look like and live in similar types of habitat.
2) Sometimes genetically different species might look like to. Dolphins and sharks are pretty similar – they both adapted to living in the same habitat. But they’re not closely related – evolve from different ancestors.
3) Evolutionary trees show common ancestors and relationships between organisms. The more recent common ancestor, the more closely related to species

Question 3

Describe points of ecological relationships

Answer 3

1) If we see organisms in the same environment with similar characteristics e.g. dolphins and sharks, it suggests they might be in competition e.g. With the same food source.
2) Differences between organisms in the same environment (e.g. dolphins swim in small groups, but herring swim in giant shoals) can show predator-prey relationships e.g. dolphins Hunt herring.