Genes And Extintion

Question 1

Changes in the environment….

Answer 1

Can mean an organism is no longer adapted to its environment

Question 2

Endangered definitions

Answer 2

A specie at risk of extinction

Question 3

Extinct definition

Answer 3

When a specie, family or other larger groups have no living members.

Question 4

Extinction factors

Answer 4

Changes in the physical environment (polar bears)

Competition from other organisms (grey and red squirrel)

Disease (Darwin frogs)

Human activities:

1. Hunting ( rabbits)
2. Habitat clearance (amazon rainforest)
3. Pollution ( turtles)

Question 5

Ways to preserve biodiversity

Answer 5

1. Banning the hunting of certain animals.
2. Setting up nature reserves.
3. Setting up breeding programs
4. Store organisms in Gene banks

Question 6

Gene bank

Answer 6

A gene bank is q place were you store part of organisms that can be used to produce the organisms again if they become extinct.

Question 7

Natural selection

Answer 7

Individuals in a specie have different characteristics

The environment changes so certain genetic characteristics are needed

The ones which have the ‘favourable’ characteristics survive and reproduce to pass the characteristics.

The next generation has a higher % of these characteristics.

Question 8

Why preserve biodiversity?

Answer 8

Because humans relay on other species and if they become extinct other species will become extinct as well.