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 of these is an advantage of sexual reproduction?
Reproduction is quick
Greater genetic variation
Only one parent is needed
Which of these is a risk of selective breeding?
Disease resistance
Development of new varieties
Less dangerous animals
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 is a benefit of selective breeding?
More dangerous animals