B1 Topic 1 Flashcards
Which kingdom has organisms with cell walls and chlorophyll?
plantae
What is the correct order for classification?
kingdom, phylum, class, order, family, genus, species
How many “kingdoms” are there?
5
What is a hybrid?
offspring of closely related species that are infertile
What is meant by the term ‘species’?
organisms that can interbreed to produce fertile offspring
What is the advantage of a binomial naming system?
allows scientists to communicate across the world
What is a ring species?
chain of closely related species but some can’t interbreed
What does survival of the fittest mean?
survival of the fittest means the organism best adapted to its surrounding is more likely to survive
What is likely to happen to an individual that is poorly suited to its environment?
It will not survive to reproduce
How does the Pompeii worm survive the high temperatures of the hydrothermal vent?
The thick layer of bacteria protects the Pompeii worm from the heat. The Pompeii worm does not move from its position.
What is discontinuous variation often caused by?
discontinuous variation is often caused by inherited variation.
When did the first simple life forms appear on Earth?
3 billion year ago
According to Darwin’s theory of evolution, how do new species evolve?
By natural selection
What was the name of the book published by Charles Darwin?
Darwin wrote ‘On the Origin of Species’.
What is an allele?
An allele is a pair of genes that code for a certain characteristic
