Natural Selection & Extinction

Question 1

What is natural selection?

Answer 1

Natural selection is the process by which organisms that are better adapted to their environment tend to survive and reproduce more effectively than those that are less well adapted.

Question 2

Examples of natural selection

Answer 2

. Giraffes with longer necks

. Grey squirrels

Question 3

Why are giraffes with longer necks better adapted?

Answer 3

Bc they can reach higher trees but shorter necks can’t and eventually go hungry and die

Question 4

Why are grey squirrels better adapted then red squirrels?

Answer 4

Great squirrels competed for food and bc they where more aggressive they she te able to get more. They also carried a disease that was fatal for reds.

Question 5

What does extinct mean?

Answer 5

None of the organisms from that species art left

Question 6

What causes extinction in a species?

Answer 6

. Too quick of a change in its environment
. Lack of food
. Hunted to extinction

Question 7

How can we prevent extinction?

Answer 7

. Protect certain habitats - wildlife refugee parks
. Breed endangered species
. Move exotic plants into protected areas
. Laws preventing people from hunting certain animals, fishing in certain areas and building in certain habitats
. Seed banks
. Gene bank ( genes stored of different species)