B1 Topic 1 Flashcards
What is a hybrid?
Hybrids are offspring from closely related species, hybrids are infertile.
What is the Larus part of the name Larus fuscus?
The Larus part of the name is the genus.
What is a ring species?
A ring species is a chain of closely related species.
What is meant by the term ‘species’?
A species can interbreed to produce fertile offspring.
What does survival of the fittest mean?
The best adapted species is most likely to survive.
What is an example of continuous variation?
Height / Weight / Foot Size
What is likely to happen to an individual that is poorly suited to its environment?
It will not survive to reproduce.
How is the polar bear adapted to survive the cold temperatures?
A white appearance, as camouflage from prey on the snow and ice.
Thick layers of fat and fur, for insulation against the cold.
A small surface area to volume ratio, to minimise heat loss.
A greasy coat, which sheds water after swimming.
How does the Pompeii worm survive the high temperatures of the hydrothermal vent?
Uses a thick layer of bacteria.
What is discontinuous variation often caused by?
Inherited variation.
What was the name of the book published by Charles Darwin?
“On the Origin of Species”.
When did the first simple life forms appear on Earth?
3 billion years ago.
According to Darwin’s theory of evolution, how do new species evolve?
By natural selection.
What is an allele?
A pair of genes that code for a certain characteristic.
You need two copies of the faulty allele to have cystic fibrosis. This means that the allele is…
Recessive.
