Material For Quiz #2 Flashcards
What is the main idea of evolution?
All life on Earth started from a common ancestor.
What are the two mechanisms of evolution?
Natural selection and genetic mutation
What is natural selection?
When
1- there is a variation in traits
2- there is a differential reproduction
3- there is heredity
What is a nucleus?
The nucleus is the centre of a cell.
What is the role of genes?
To transmit hereditary characteristics
What is genetic mutation?
A change in a gene
What is the blueprint of life?
DNA
When some traits are favoured in populations, it is an example of…
Natural selection
Brown hair is an example of…
Dominant genes
Chromosomes are located in the…
Nucleus of a cell
Genes are…
A segment of a chromosome.
What are adaptations?
Features that enable organisms to improve their chances of survival. They are developed over multiple generations.
What are the two types of adaptation?
Physical and behavioural
What is evolution? How long does it take for something to evolve?
Biological evolution is the process by which modern organisms have descended by ancient ancestors, with genetic changes from one generation to the next. It takes generations and generations for something to evolve.
