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Flashcards in B1 - Evolution Deck (15)
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What is the theory of evolution?

All species evolved from simple life forms that first developed 3 billion years ago.

1

What was Lamarck's theory of evolution?

-All organisms were linked by a fountain of life.
-Useful changes were developed.
-Useless features shrunk and were lost.

2

Why wasn't Lamarck's theory of evolution widely accepted?

-There was no evidence of the fountain of life.
-People didn't like the idea of being descended form worms.
-People saw changes weren't necessarily passed on to their children.

3

Explain natural selection.

-Reproduction gives more offspring than the environment can support.
-Only those with inherited features most suited to the environment survived.
-When they breed, the useful characteristic genes are passed on.

4

Why did it take so long for Darwin to publish his ideas?

He needed to amount a considerable sum of evidence.

5

Give three examples of evidence that Darwin used to support his theory of natural selection.

-The organisms on different islands.
-Breeding experiments with pigeons.
-Study of barnacles.

6

Give three reasons Darwin's ideas not accepted quickly.

-The theory of evolution challenged the idea of God.
-Scientists didn't think there was enough evidence.
-There was no way to explain why variety and inheritance happened.

7

What is a mutation?

Change in the genetic material which results in a new form of gene.

8

What is classification?

The organisation of living things into groups according to their similarities.

9

Why is classification useful?

It helps scientists understand evolutionary and ecological relationships.

10

What is the biggest group in a classification system?

Kingdoms.

11

How are organisms put into kingdoms?

They have many differences but some fundamental similarities.

12

What is the smallest group in a classification system?

Species

13

What is an evolutionary tree?

A classification which shows the evolutionary links between organisms.

14

What is an ecological relationship?

How species have evolved together in an environment.