Topic 4C Flashcards
Why is courtship essential.
For successful mating and species recognition.
What is a species?
A group of similar organisms that can breed to make fertile offspring. - essential for survival of their species to survive as advantageous alleles must be passed on.
What are courtship rituals?
A range of different sequences of actions which is unique to each species.
Give an example of a courtship ritual.
Dance moves, sounds, release of pheromones, display of colourful feathers or fighting.
What is a females reaction to a courtship ritual if they want to mate with a male?
They will watch the male.
How does courtship ensure the survival of offspring?
It forms a pair bond, as they choose a strong, healthy mate (extra energy.
If the species is similar, how will their courtship rituals relate?
Very similar, more similar species = more similar courtship rituals.
How are courtship rituals determines?
Genetically, the DNA base sequence (primary structure).
What is the binomial system?
The way organisms are named universally.
What does the same genus mean?
The animals are closely related.
Why might a species look similar but not share similar genus or species?
They live in a similar environment; they have similar selection pressures; similar alleles will have selective advantage; produces similar/same proteins and therefore have similar characteristics.
What is anagram for classification system?
Don’t kiss pregnant chicks only for good sex.
Name the classification system.
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
What is a heirarchy?
Smaller groups arranged within larger groups with no overlap.
In classification systems, what is each group called?
Taxa.
Why do classification systems exist?
To understand relationships between organisms and keep track of changes.
Name 4 other classification systems.
DNA sequence.
mRNA sequence.
Amino acid sequence.
Immunological.
What is Phylogenetic classification?
Arranges species into groups according to their evolutionary origins and relationships.
What does a phylogenetic tree show?
Organisms evolve from common ancestors.
What is species diversity?
The number of different species and individuals within each species in a community.
What is genetic diversity?
The variety of genes amongst all the individuals in a population of one species.
What is ecosystem diversity?
The range of different habitats.
Species richness.
The number of different species in a particular area at the particular.
What is biodiversity?
A range of habitat from local habitats to the entire earth.
