Natural Selection 1

Question 1

What is adaptive radiation

Answer 1

The evolution of a single species into several different species that are adapted to suit their different ecological niches

Question 2

What is the name of the enzyme used to cut DNA out

Answer 2

Endonuclease

Question 3

What is the name of the enzymes which join DNA chains together and to add a new gene into bacteria

Answer 3

Ligase

Question 4

What is stomatic fusion

Answer 4

Where sexual in capability can be overcome between to plant species by removing the cell wall using cellulase to create protoplasts, treating the protoplasts with chemicals to fuse the membranes together, the nuclei forms s diploid chromosome number and after repeatedly devising a callus is formed and treated with plant growth substances to let the plant develop and grow

Question 5

What are the 3 isolation mechanisms and give an example of them

Answer 5

Geographical - where the species are seperated by a river
Reproductive- where the species are seperated by a barrier and cannot reproduce together
Ecological - changes in temperature or conditions which means they are unsuitable to stay in that region or area