Genetic variation, as well as changes in the environment, cause characteristics of organisms to change over time. This process of natural selection leads to the evolution of new species.
What does genotype mean?
The combination of genes an organism has
The combination of alleles an organism has
The characteristics an organism has
What is a mutation?
A random change in DNA
A random change in the structure of a nucleus
A non-random change in DNA
Which two scientists independently proposed the theory of evolution?
Watson and Crick
Darwin and Watson
Wallace and Darwin
What does 'survival of the fittest' mean?
The organism that is best suited to the environment will survive
The organism that is least suited to the environment will survive
The organism that can change to suit its environment will survive
What is a species?
A group of organisms that can interbreed with one another to produce fertile offspring
A group of organisms that cannot interbreed with one another to produce fertile offspring
A group of organisms that can interbreed with one another to produce infertile offspring
Which of these describes the start of the process of the development of antibiotic resistance?
A bacterium gains a random mutation and becomes antibiotic resistant
A bacterium is exposed to an antibiotic and its structure changes
A bacterium changes its DNA to make it antibiotic resistant
What is a disadvantage of asexual reproduction?
It is quick and so lots of offspring are produced
The organism does not need to find a mate
All individuals within the population could be susceptible to disease
Which of these could cause a new species to evolve?
A river separating a field into half
The habitat getting warmer
A new predator entering the environment
Why might people disagree with the theory of evolution?
There is too much evidence to support the theory
It contrasts with their religious beliefs
Other scientists have proven the theory first
Which of these cows would a farmer choose to use in a selective breeding programme?
A small, skinny cow
A large, heavy cow
A cow that is not immune to diseases